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, $dir_idle);
32 my ($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 $p =~ tr!/!/!s; # squeeze redundant slashes
73 chop($p) if substr($p, -1, 1) eq '/';
76 my $pwd = $self->{env}->{PWD};
79 my $xcwd = $self->{3} //
80 ($cwd = getcwd() // die "getcwd(PWD=$pwd): $!");
81 if (my @st_pwd = stat($pwd)) {
82 my @st_cwd = stat($xcwd) or die "stat($xcwd): $!";
83 "@st_pwd[1,0]" eq "@st_cwd[1,0]" or
84 $self->{env}->{PWD} = $pwd = undef;
85 } else { # PWD was invalid
86 $self->{env}->{PWD} = $pwd = undef;
89 $pwd //= $self->{env}->{PWD} = $cwd // getcwd() // die "getcwd: $!";
90 File::Spec->rel2abs($p, $pwd);
93 # abs_path resolves symlinks in parent iff all parents exist
94 sub abs_path { Cwd::abs_path($_[1]) // rel2abs(@_) }
96 sub share_path ($) { # $HOME/.local/share/lei/$FOO
98 rel2abs($self, ($self->{env}->{XDG_DATA_HOME} //
99 ($self->{env}->{HOME} // '/nonexistent').'/.local/share')
103 sub store_path ($) { share_path($_[0]) . '/store' }
105 sub _config_path ($) {
107 rel2abs($self, ($self->{env}->{XDG_CONFIG_HOME} //
108 ($self->{env}->{HOME} // '/nonexistent').'/.config')
114 rel2abs($self, ($self->{env}->{XDG_CACHE_HOME} //
115 ($self->{env}->{HOME} // '/nonexistent').'/.cache')
121 $self->{ale} //= do {
122 require PublicInbox::LeiALE;
123 $self->_lei_cfg(1)->{ale} //= PublicInbox::LeiALE->new($self);
128 # TODO: drop underscore variants everywhere, they're undocumented
129 qw(fsync|sync! jobs|j=i indexlevel|L=s compact
130 max_size|max-size=s sequential_shard|sequential-shard
131 batch_size|batch-size=s skip-docdata)
134 my @c_opt = qw(c=s@ C=s@ quiet|q);
135 my @lxs_opt = (qw(remote! local! external! include|I=s@ exclude=s@ only=s@
136 import-remote! no-torsocks torsocks=s),
137 PublicInbox::LeiQuery::curl_opt());
139 # we don't support -C as an alias for --find-copies since it's already
141 our @diff_opt = qw(unified|U=i output-indicator-new=s output-indicator-old=s
142 output-indicator-context=s indent-heuristic!
143 minimal patience histogram anchored=s@ diff-algorithm=s
144 color-moved:s color-moved-ws=s no-color-moved no-color-moved-ws
145 word-diff:s word-diff-regex=s color-words:s no-renames
146 rename-empty! check ws-error-highlight=s full-index binary
147 abbrev:i break-rewrites|B:s find-renames|M:s find-copies:s
148 find-copies-harder irreversible-delete|D l=i diff-filter=s
149 S=s G=s find-object=s pickaxe-all pickaxe-regex O=s R
150 relative:s text|a ignore-cr-at-eol ignore-space-at-eol
151 ignore-space-change|b ignore-all-space|w ignore-blank-lines
152 inter-hunk-context=i function-context|W exit-code ext-diff
153 no-ext-diff textconv! src-prefix=s dst-prefix=s no-prefix
156 # we generate shell completion + help using %CMD and %OPTDESC,
157 # see lei__complete() and PublicInbox::LeiHelp
158 # command => [ positional_args, 1-line description, Getopt::Long option spec ]
159 our %CMD = ( # sorted in order of importance/use:
160 'q' => [ '--stdin|SEARCH_TERMS...', 'search for messages matching terms',
161 'stdin|', # /|\z/ must be first for lone dash
163 qw(save output|mfolder|o=s format|f=s dedupe|d=s threads|t+
164 sort|s=s reverse|r offset=i pretty jobs|j=s globoff|g augment|a
165 import-before! lock=s@ rsyncable alert=s@ mua=s verbose|v+
166 color! mail-sync!), @c_opt, opt_dash('limit|n=i', '[0-9]+') ],
168 'up' => [ 'OUTPUT|--all', 'update saved search',
169 qw(jobs|j=s lock=s@ alert=s@ mua=s verbose|v+ all:s), @c_opt ],
171 'lcat' => [ '--stdin|MSGID_OR_URL...', 'display local copy of message(s)',
172 'stdin|', # /|\z/ must be first for lone dash
173 # some of these options are ridiculous for lcat
174 @lxs_opt, qw(output|mfolder|o=s format|f=s dedupe|d=s threads|t+
175 sort|s=s reverse|r offset=i jobs|j=s globoff|g augment|a
176 import-before! lock=s@ rsyncable alert=s@ mua=s verbose|v+
177 color!), @c_opt, opt_dash('limit|n=i', '[0-9]+') ],
179 'blob' => [ 'OID', 'show a git blob, reconstructing from mail if necessary',
180 qw(git-dir=s@ cwd! verbose|v+ mail! oid-a|A=s path-a|a=s path-b|b=s),
183 'rediff' => [ '--stdin|LOCATION...',
184 'regenerate a diff with different options',
185 'stdin|', # /|\z/ must be first for lone dash
186 qw(git-dir=s@ cwd! verbose|v+ color:s no-color),
187 @diff_opt, @lxs_opt, @c_opt ],
189 'add-external' => [ 'LOCATION',
190 'add/set priority of a publicinbox|extindex for extra matches',
191 qw(boost=i mirror=s no-torsocks torsocks=s inbox-version=i
192 verbose|v+), @c_opt, index_opt(),
193 PublicInbox::LeiQuery::curl_opt() ],
194 'ls-external' => [ '[FILTER]', 'list publicinbox|extindex locations',
195 qw(format|f=s z|0 globoff|g invert-match|v local remote), @c_opt ],
196 'ls-label' => [ '', 'list labels', qw(z|0 stats:s), @c_opt ],
197 'ls-mail-sync' => [ '[FILTER]', 'list mail sync folders',
198 qw(z|0 globoff|g invert-match|v local remote), @c_opt ],
199 'forget-external' => [ 'LOCATION...|--prune',
200 'exclude further results from a publicinbox|extindex',
203 'ls-search' => [ '[PREFIX]', 'list saved search queries',
204 qw(format|f=s pretty l ascii z|0), @c_opt ],
205 'forget-search' => [ 'OUTPUT', 'forget a saved search',
206 qw(verbose|v+), @c_opt ],
207 'edit-search' => [ 'OUTPUT', "edit saved search via `git config --edit'",
209 'rm' => [ '--stdin|LOCATION...',
210 'remove a message from the index and prevent reindexing',
211 'stdin|', # /|\z/ must be first for lone dash
213 'plonk' => [ '--threads|--from=IDENT',
214 'exclude mail matching From: or threads from non-Message-ID searches',
215 qw(stdin| threads|t from|f=s mid=s oid=s), @c_opt ],
216 'tag' => [ 'KEYWORDS...',
217 'set/unset keywords and/or labels on message(s)',
218 qw(stdin| in-format|F=s input|i=s@ oid=s@ mid=s@),
219 qw(no-torsocks torsocks=s), PublicInbox::LeiQuery::curl_opt(), @c_opt,
220 pass_through('-kw:foo for delete') ],
221 'forget' => [ '[--stdin|--oid=OID|--by-mid=MID]',
222 "exclude message(s) on stdin from `q' search results",
223 qw(stdin| oid=s exact by-mid|mid:s), @c_opt ],
225 'purge-mailsource' => [ 'LOCATION|--all',
226 'remove imported messages from IMAP, Maildirs, and MH',
227 qw(exact! all jobs:i indexed), @c_opt ],
229 'add-watch' => [ 'LOCATION', 'watch for new messages and flag changes',
230 qw(import! kw! interval=s recursive|r
231 exclude=s include=s), @c_opt ],
232 'ls-watch' => [ '[FILTER...]', 'list active watches with numbers and status',
233 qw(format|f=s z), @c_opt ],
234 'pause-watch' => [ '[WATCH_NUMBER_OR_FILTER]', qw(all local remote), @c_opt ],
235 'resume-watch' => [ '[WATCH_NUMBER_OR_FILTER]', qw(all local remote), @c_opt ],
236 'forget-watch' => [ '{WATCH_NUMBER|--prune}', 'stop and forget a watch',
239 'index' => [ 'LOCATION...', 'one-time index from URL or filesystem',
240 qw(in-format|F=s kw! offset=i recursive|r exclude=s include|I=s
241 verbose|v+ incremental!),
242 PublicInbox::LeiQuery::curl_opt(), # mainly for --proxy=
244 'import' => [ 'LOCATION...|--stdin',
245 'one-time import/update from URL or filesystem',
246 qw(stdin| offset=i recursive|r exclude=s include|I=s
247 lock=s@ in-format|F=s kw! verbose|v+ incremental! mail-sync!),
248 qw(no-torsocks torsocks=s), PublicInbox::LeiQuery::curl_opt(), @c_opt ],
249 'forget-mail-sync' => [ 'LOCATION...',
250 'forget sync information for a mail folder', @c_opt ],
251 'export-kw' => [ 'LOCATION...|--all',
252 'one-time export of keywords of sync sources',
253 qw(all:s mode=s), @c_opt ],
254 'convert' => [ 'LOCATION...|--stdin',
255 'one-time conversion from URL or filesystem to another format',
256 qw(stdin| in-format|F=s out-format|f=s output|mfolder|o=s lock=s@ kw!),
257 qw(no-torsocks torsocks=s), PublicInbox::LeiQuery::curl_opt(), @c_opt ],
258 'p2q' => [ 'FILE|COMMIT_OID|--stdin',
259 "use a patch to generate a query for `lei q --stdin'",
260 qw(stdin| want|w=s@ uri debug), @c_opt ],
261 'config' => [ '[...]', sub {
262 'git-config(1) wrapper for '._config_path($_[0]);
263 }, qw(config-file|system|global|file|f=s), # for conflict detection
264 qw(c=s@ C=s@), pass_through('git config') ],
265 'inspect' => [ 'ITEMS...', 'inspect lei/store and/or local external',
266 qw(pretty ascii dir=s), @c_opt ],
268 'init' => [ '[DIRNAME]', sub {
269 "initialize storage, default: ".store_path($_[0]);
271 'daemon-kill' => [ '[-SIGNAL]', 'signal the lei-daemon',
272 # "-C DIR" conflicts with -CHLD, here, and chdir makes no sense, here
273 opt_dash('signal|s=s', '[0-9]+|(?:[A-Z][A-Z0-9]+)') ],
274 'daemon-pid' => [ '', 'show the PID of the lei-daemon' ],
275 'help' => [ '[SUBCOMMAND]', 'show help' ],
277 # XXX do we need this?
278 # 'git' => [ '[ANYTHING...]', 'git(1) wrapper', pass_through('git') ],
280 'reorder-local-store-and-break-history' => [ '[REFNAME]',
281 'rewrite git history in an attempt to improve compression',
284 # internal commands are prefixed with '_'
285 '_complete' => [ '[...]', 'internal shell completion helper',
286 pass_through('everything') ],
289 # switch descriptions, try to keep consistent across commands
290 # $spec: Getopt::Long option specification
291 # $spec => [@ALLOWED_VALUES (default is first), $description],
292 # $spec => $description
293 # "$SUB_COMMAND TAB $spec" => as above
294 my $stdin_formats = [ 'MAIL_FORMAT|eml|mboxrd|mboxcl2|mboxcl|mboxo',
295 'specify message input format' ];
296 my $ls_format = [ 'OUT|plain|json|null', 'listing output format' ];
298 # we use \x{a0} (non-breaking SP) to avoid wrapping in PublicInbox::LeiHelp
300 'help|h' => 'show this built-in help',
301 'c=s@' => [ 'NAME=VALUE', 'set config option' ],
302 'C=s@' => [ 'DIR', 'chdir to specify to directory' ],
303 'quiet|q' => 'be quiet',
304 'lock=s@' => [ 'METHOD|dotlock|fcntl|flock|none',
305 'mbox(5) locking method(s) to use (default: fcntl,dotlock)' ],
307 'incremental! import' => 'import already seen IMAP and NNTP articles',
308 'globoff|g' => "do not match locations using '*?' wildcards ".
309 "and\xa0'[]'\x{a0}ranges",
310 'invert-match|v' => 'select non-matching lines',
311 'color!' => 'disable color (for --format=text)',
312 'verbose|v+' => 'be more verbose',
313 'external!' => 'do not use externals',
314 'mail!' => 'do not look in mail storage for OID',
315 'cwd!' => 'do not look in git repo of current working directory',
316 'oid-a|A=s' => 'pre-image OID',
317 'path-a|a=s' => 'pre-image pathname associated with OID',
318 'path-b|b=s' => 'post-image pathname associated with OID',
319 'git-dir=s@' => 'additional git repository to scan',
320 'proxy=s' => [ 'PROTO://HOST[:PORT]', # shared with curl(1)
321 "proxy for (e.g. `socks5h://0:9050')" ],
322 'torsocks=s' => ['VAL|auto|no|yes',
323 'whether or not to wrap git and curl commands with torsocks'],
324 'no-torsocks' => 'alias for --torsocks=no',
325 'save' => "save a search for `lei up'",
326 'import-remote!' => 'do not memoize remote messages into local store',
328 'type=s' => [ 'any|mid|git', 'disambiguate type' ],
330 'dedupe|d=s' => ['STRATEGY|content|oid|mid|none',
331 'deduplication strategy'],
333 'return all messages in the same threads as the actual match(es)',
335 'want|w=s@' => [ 'PREFIX|dfpost|dfn', # common ones in help...
336 'search prefixes to extract (default: dfpost7)' ],
338 'alert=s@' => ['CMD,:WINCH,:bell,<any command>',
339 'run command(s) or perform ops when done writing to output ' .
340 '(default: ":WINCH,:bell" with --mua and Maildir/IMAP output, ' .
341 'nothing otherwise)' ],
343 'augment|a' => 'augment --output destination instead of clobbering',
345 'output|mfolder|o=s' => [ 'MFOLDER',
346 "destination (e.g.\xa0`/path/to/Maildir', ".
347 "or\xa0`-'\x{a0}for\x{a0}stdout)" ],
349 "MUA to run on --output Maildir or mbox (e.g.\xa0`mutt\xa0-f\xa0%f')" ],
351 'inbox-version=i' => [ 'NUM|1|2',
352 'force a public-inbox version with --mirror'],
353 'mirror=s' => [ 'URL', 'mirror a public-inbox'],
355 # public-inbox-index options
356 'fsync!' => 'speed up indexing after --mirror, risk index corruption',
357 'compact' => 'run compact index after mirroring',
358 'indexlevel|L=s' => [ 'LEVEL|full|medium|basic',
359 "indexlevel with --mirror (default: full)" ],
360 'max_size|max-size=s' => [ 'SIZE',
361 'do not index messages larger than SIZE (default: infinity)' ],
362 'batch_size|batch-size=s' => [ 'SIZE',
363 'flush changes to OS after given number of bytes (default: 1m)' ],
364 'sequential_shard|sequential-shard' =>
365 'index Xapian shards sequentially for slow storage',
367 'drop compatibility w/ public-inbox <1.6 to save ~1.5% space',
370 'OUT|maildir|mboxrd|mboxcl2|mboxcl|mboxo|html|json|jsonl|concatjson',
371 'specify output format, default depends on --output'],
372 'exclude=s@ q' => [ 'LOCATION',
373 'exclude specified external(s) from search' ],
374 'include|I=s@ q' => [ 'LOCATION',
375 'include specified external(s) in search' ],
376 'only=s@ q' => [ 'LOCATION',
377 'only use specified external(s) for search' ],
378 'jobs=s q' => [ '[SEARCH_JOBS][,WRITER_JOBS]',
379 'control number of search and writer jobs' ],
380 'jobs|j=i add-external' => 'set parallelism when indexing after --mirror',
382 'in-format|F=s' => $stdin_formats,
383 'format|f=s ls-search' => ['OUT|json|jsonl|concatjson',
384 'listing output format' ],
385 'l ls-search' => 'long listing format',
386 'format|f=s ls-external' => $ls_format,
388 'limit|n=i@' => ['NUM', 'limit on number of matches (default: 10000)' ],
389 'offset=i' => ['OFF', 'search result offset (default: 0)'],
391 'sort|s=s' => [ 'VAL|received|relevance|docid',
392 "order of results is `--output'-dependent"],
393 'reverse|r' => 'reverse search results', # like sort(1)
395 'boost=i' => 'increase/decrease priority of results (default: 0)',
397 'local' => 'limit operations to the local filesystem',
398 'local!' => 'exclude results from the local filesystem',
399 'remote' => 'limit operations to those requiring network access',
400 'remote!' => 'prevent operations requiring network access',
402 'all:s up' => ['local', 'update all (local) saved searches' ],
404 'mid=s' => 'specify the Message-ID of a message',
405 'oid=s' => 'specify the git object ID of a message',
407 'recursive|r' => 'scan directories/mailboxes/newsgroups recursively',
408 'exclude=s' => 'exclude mailboxes/newsgroups based on pattern',
409 'include=s' => 'include mailboxes/newsgroups based on pattern',
411 'exact' => 'operate on exact header matches only',
412 'exact!' => 'rely on content match instead of exact header matches',
414 'by-mid|mid:s' => [ 'MID', 'match only by Message-ID, ignoring contents' ],
416 'kw!' => 'disable/enable importing keywords (aka "flags")',
418 # xargs, env, use "-0", git(1) uses "-z". We support z|0 everywhere
419 'z|0' => 'use NUL \\0 instead of newline (CR) to delimit lines',
421 'signal|s=s' => [ 'SIG', 'signal to send lei-daemon (default: TERM)' ],
425 'leistore.dir' => 'top-level storage location',
428 my @WQ_KEYS = qw(lxs l2m wq1); # internal workers
432 for my $wq (grep(defined, delete(@$self{@WQ_KEYS}))) {
434 $wq->wq_close(0, undef, $self);
435 } elsif ($wq->wq_kill_old) {
436 $wq->wq_wait_old(undef, $self);
442 # pronounced "exit": x_it(1 << 8) => exit(1); x_it(13) => SIGPIPE
444 my ($self, $code) = @_;
445 # make sure client sees stdout before exit
446 $self->{1}->autoflush(1) if $self->{1};
447 dump_and_clear_log();
448 if (my $s = $self->{pkt_op_p} // $self->{sock}) {
449 send($s, "x_it $code", MSG_EOR);
450 } # else ignore if client disconnected
455 my $err = $self->{2} // ($self->{pgr} // [])->[2] // *STDERR{GLOB};
456 my @eor = (substr($_[-1]//'', -1, 1) eq "\n" ? () : ("\n"));
457 print $err @_, @eor and return;
458 my $old_err = delete $self->{2};
459 close($old_err) if $! == EPIPE && $old_err;
460 $err = $self->{2} = ($self->{pgr} // [])->[2] // *STDERR{GLOB};
461 print $err @_, @eor or print STDERR @_, @eor;
464 sub qerr ($;@) { $_[0]->{opt}->{quiet} or err(shift, @_) }
466 sub fail_handler ($;$$) {
467 my ($lei, $code, $io) = @_;
468 close($io) if $io; # needed to avoid warnings on SIGPIPE
470 x_it($lei, $code // (1 << 8));
473 sub sigpipe_handler { # handles SIGPIPE from @WQ_KEYS workers
474 fail_handler($_[0], 13, delete $_[0]->{1});
477 # PublicInbox::OnDestroy callback for SIGINT to take out the entire pgid
480 dwaitpid($pgid) if kill('-INT', $pgid);
484 my ($self, $buf, $exit_code) = @_;
485 err($self, $buf) if defined $buf;
486 # calls fail_handler:
487 send($self->{pkt_op_p}, '!', MSG_EOR) if $self->{pkt_op_p};
488 x_it($self, ($exit_code // 1) << 8);
494 return if print { $self->{1} // return } @_; # likely
495 return note_sigpipe($self, 1) if $! == EPIPE;
496 my $err = "error writing to output: $!";
501 sub puts ($;@) { out(shift, map { "$_\n" } @_) }
503 sub child_error { # passes non-fatal curl exit codes to user
504 my ($self, $child_error, $msg) = @_; # child_error is $?
505 $self->err($msg) if $msg;
506 if (my $s = $self->{pkt_op_p} // $self->{sock}) {
507 # send to the parent lei-daemon or to lei(1) client
508 send($s, "child_error $child_error", MSG_EOR);
509 } elsif (!$PublicInbox::DS::in_loop) {
510 $self->{child_error} = $child_error;
511 } # else noop if client disconnected
514 sub note_sigpipe { # triggers sigpipe_handler
515 my ($self, $fd) = @_;
516 close(delete($self->{$fd})); # explicit close silences Perl warning
517 send($self->{pkt_op_p}, '|', MSG_EOR) if $self->{pkt_op_p};
521 sub _lei_atfork_child {
522 my ($self, $persist) = @_;
523 # we need to explicitly close things which are on stack
525 chdir '/' or die "chdir(/): $!";
526 close($_) for (grep(defined, delete @$self{qw(0 1 2 sock)}));
527 if (my $cfg = $self->{cfg}) {
528 delete $cfg->{-lei_store};
530 } else { # worker, Net::NNTP (Net::Cmd) uses STDERR directly
531 open STDERR, '+>&='.fileno($self->{2}) or warn "open $!";
532 STDERR->autoflush(1);
534 close($_) for (grep(defined, delete @$self{qw(3 old_1 au_done)}));
535 if (my $op_c = delete $self->{pkt_op_c}) {
536 close(delete $op_c->{sock});
538 if (my $pgr = delete $self->{pgr}) {
539 close($_) for (@$pgr[1,2]);
541 close $listener if $listener;
546 $quit = \&CORE::exit;
547 $self->{-eml_noisy} or # only "lei import" sets this atm
548 $SIG{__WARN__} = PublicInbox::Eml::warn_ignore_cb();
549 $current_lei = $persist ? undef : $self; # for SIG{__WARN__}
552 sub _delete_pkt_op { # OnDestroy callback to prevent leaks on die
554 if (my $op = delete $self->{pkt_op_c}) { # in case of die
555 $op->close; # PublicInbox::PktOp::close
557 my $unclosed_after_die = delete($self->{pkt_op_p}) or return;
558 close $unclosed_after_die;
563 require PublicInbox::OnDestroy;
564 require PublicInbox::PktOp;
565 my $end = PublicInbox::OnDestroy->new($$, \&_delete_pkt_op, $self);
566 @$self{qw(pkt_op_c pkt_op_p)} = PublicInbox::PktOp->pair;
571 my ($lei, $wq, $jobs, $ops) = @_;
573 '!' => [ \&fail_handler, $lei ],
574 '|' => [ \&sigpipe_handler, $lei ],
575 'x_it' => [ \&x_it, $lei ],
576 'child_error' => [ \&child_error, $lei ],
579 $ops->{''} //= [ $wq->can('_lei_wq_eof') || \&wq_eof, $lei ];
580 my $end = $lei->pkt_op_pair;
581 my $ident = $wq->{-wq_ident} // "lei-$lei->{cmd} worker";
582 $wq->wq_workers_start($ident, $jobs, $lei->oldset, { lei => $lei });
583 delete $lei->{pkt_op_p};
584 my $op_c = delete $lei->{pkt_op_c};
586 $lei->event_step_init;
591 require PublicInbox::LeiHelp;
592 PublicInbox::LeiHelp::call($_[0], $_[1], \%CMD, \%OPTDESC);
596 my ($self, $cmd, $argv) = @_;
597 # allow _complete --help to complete, not show help
598 return 1 if substr($cmd, 0, 1) eq '_';
600 $OPT = $self->{opt} //= {};
601 my $info = $CMD{$cmd} // [ '[...]' ];
602 my ($proto, undef, @spec) = @$info;
603 my $glp = ref($spec[-1]) eq ref($GLP) ? pop(@spec) : $GLP;
604 push @spec, qw(help|h);
606 if ($spec[0] =~ s/\|\z//s) { # "stdin|" or "clear|" allows "-" alias
607 $lone_dash = $spec[0];
608 $OPT->{$spec[0]} = \(my $var);
609 push @spec, '' => \$var;
611 $glp->getoptionsfromarray($argv, $OPT, @spec) or
612 return _help($self, "bad arguments or options for $cmd");
613 return _help($self) if $OPT->{help};
615 push @$argv, @{$OPT->{-argv}} if defined($OPT->{-argv});
617 # "-" aliases "stdin" or "clear"
618 $OPT->{$lone_dash} = ${$OPT->{$lone_dash}} if defined $lone_dash;
621 my $POS_ARG = '[A-Z][A-Z0-9_]+';
623 my @args = split(/ /, $proto);
624 for my $var (@args) {
625 if ($var =~ /\A$POS_ARG\.\.\.\z/o) { # >= 1 args;
626 $inf = defined($argv->[$i]) and last;
627 $var =~ s/\.\.\.\z//;
628 $err = "$var not supplied";
629 } elsif ($var =~ /\A$POS_ARG\z/o) { # required arg at $i
630 $argv->[$i++] // ($err = "$var not supplied");
631 } elsif ($var =~ /\.\.\.\]\z/) { # optional args start
634 } elsif ($var =~ /\A\[-?$POS_ARG\]\z/) { # one optional arg
636 } elsif ($var =~ /\A.+?\|/) { # required FOO|--stdin
637 $inf = 1 if index($var, '...') > 0;
638 my @or = split(/\|/, $var);
641 if ($o =~ /\A--([a-z0-9\-]+)/) {
642 $ok = defined($OPT->{$1});
644 } elsif (defined($argv->[$i])) {
648 } # else continue looping
652 $err = join(', ', @or) . " or $last must be set";
654 warn "BUG: can't parse `$var' in $proto";
658 if (!$inf && scalar(@$argv) > scalar(@args)) {
659 $err //= 'too many arguments';
661 $err ? fail($self, "usage: lei $cmd $proto\nE: $err") : 1;
664 sub _tmp_cfg { # for lei -c <name>=<value> ...
666 my $cfg = _lei_cfg($self, 1);
668 my $ft = File::Temp->new(TEMPLATE => 'lei_cfg-XXXX', TMPDIR => 1);
669 my $tmp = { '-f' => $ft->filename, -tmp => $ft };
671 print $ft <<EOM or return fail($self, "$tmp->{-f}: $!");
675 $tmp = $self->{cfg} = bless { %$cfg, %$tmp }, ref($cfg);
676 for (@{$self->{opt}->{c}}) {
677 /\A([^=\.]+\.[^=]+)(?:=(.*))?\z/ or return fail($self, <<EOM);
678 `-c $_' is not of the form -c <name>=<value>'
682 _config($self, '--add', $name, $value);
683 if (defined(my $v = $tmp->{$name})) {
684 if (ref($v) eq 'ARRAY') {
687 $tmp->{$name} = [ $v, $value ];
690 $tmp->{$name} = $value;
696 my ($self, $cmd, $pfx) = @_;
700 $cb = $self->can($pfx.$ucmd) and return $cb;
702 $base =~ s/_([a-z])/\u$1/g;
703 my $pkg = "PublicInbox::Lei\u$base";
704 ($INC{"PublicInbox/Lei\u$base.pm"} // eval("require $pkg")) ?
705 $pkg->can($pfx.$ucmd) : undef;
709 my ($self, $cmd, @argv) = @_;
710 local $current_lei = $self; # for __WARN__
711 $self->{2}->autoflush(1); # keep stdout buffered until x_it|DESTROY
712 dump_and_clear_log("from previous run\n");
713 return _help($self, 'no command given') unless defined($cmd);
714 # do not support Getopt bundling for this
715 while ($cmd eq '-C' || $cmd eq '-c') {
716 my $v = shift(@argv) // return fail($self, $cmd eq '-C' ?
717 '-C DIRECTORY' : '-c <name>=<value>');
718 push @{$self->{opt}->{substr($cmd, 1, 1)}}, $v;
719 $cmd = shift(@argv) // return _help($self, 'no command given');
721 if (my $cb = lazy_cb(__PACKAGE__, $cmd, 'lei_')) {
722 optparse($self, $cmd, \@argv) or return;
723 $self->{opt}->{c} and (_tmp_cfg($self) // return);
724 if (my $chdir = $self->{opt}->{C}) {
725 for my $d (@$chdir) {
726 next if $d eq ''; # same as git(1)
727 chdir $d or return fail($self, "cd $d: $!");
729 if (delete $self->{3}) { # update cwd for rel2abs
730 opendir my $dh, '.' or
731 return fail($self, "opendir . $!");
736 } elsif (grep(/\A-/, $cmd, @argv)) { # --help or -h only
737 $GLP->getoptionsfromarray([$cmd, @argv], {}, qw(help|h C=s@))
738 or return _help($self, 'bad arguments or options');
741 fail($self, "`$cmd' is not an lei command");
746 my ($self, $creat) = @_;
747 return $self->{cfg} if $self->{cfg};
748 my $f = _config_path($self);
750 my $cur_st = @st ? pack('dd', $st[10], $st[7]) : ''; # 10:ctime, 7:size
752 if (my $cfg = $PATH2CFG{$f}) { # reuse existing object in common case
753 return ($self->{cfg} = $cfg) if $cur_st eq $cfg->{-st};
754 ($sto, $sto_dir) = @$cfg{qw(-lei_store leistore.dir)};
759 return bless {}, 'PublicInbox::Config';
761 my (undef, $cfg_dir, undef) = File::Spec->splitpath($f);
762 -d $cfg_dir or mkpath($cfg_dir) or die "mkpath($cfg_dir): $!\n";
763 open my $fh, '>>', $f or die "open($f): $!\n";
764 @st = stat($fh) or die "fstat($f): $!\n";
765 $cur_st = pack('dd', $st[10], $st[7]);
766 qerr($self, "# $f created") if $self->{cmd} ne 'config';
768 my $cfg = PublicInbox::Config->git_config_dump($f);
769 $cfg->{-st} = $cur_st;
771 if ($sto && File::Spec->canonpath($sto_dir // store_path($self))
772 eq File::Spec->canonpath($cfg->{'leistore.dir'} //
773 store_path($self))) {
774 $cfg->{-lei_store} = $sto;
776 if (scalar(keys %PATH2CFG) > 5) {
777 # FIXME: use inotify/EVFILT_VNODE to detect unlinked configs
778 for my $k (keys %PATH2CFG) {
779 delete($PATH2CFG{$k}) unless -f $k
782 $self->{cfg} = $PATH2CFG{$f} = $cfg;
785 sub _lei_store ($;$) {
786 my ($self, $creat) = @_;
787 my $cfg = _lei_cfg($self, $creat);
788 $cfg->{-lei_store} //= do {
789 require PublicInbox::LeiStore;
790 my $dir = $cfg->{'leistore.dir'} // store_path($self);
791 return unless $creat || -d $dir;
792 PublicInbox::LeiStore->new($dir, { creat => $creat });
797 my ($self, @argv) = @_;
798 my %env = (%{$self->{env}}, GIT_CONFIG => undef);
799 my $cfg = _lei_cfg($self, 1);
800 my $cmd = [ qw(git config -f), $cfg->{'-f'}, @argv ];
801 my %rdr = map { $_ => $self->{$_} } (0..2);
802 waitpid(spawn($cmd, \%env, \%rdr), 0);
806 my ($self, @argv) = @_;
807 $self->{opt}->{'config-file'} and return fail $self,
808 "config file switches not supported by `lei config'";
810 x_it($self, $?) if $?;
813 sub lei_daemon_pid { puts shift, $$ }
815 sub lei_daemon_kill {
817 my $sig = $self->{opt}->{signal} // 'TERM';
818 kill($sig, $$) or fail($self, "kill($sig, $$): $!");
821 # Shell completion helper. Used by lei-completion.bash and hopefully
822 # other shells. Try to do as much here as possible to avoid redundancy
823 # and improve maintainability.
825 my ($self, @argv) = @_; # argv = qw(lei and any other args...)
826 shift @argv; # ignore "lei", the entire command is sent
827 @argv or return puts $self, grep(!/^_/, keys %CMD), qw(--help -h -C);
828 my $cmd = shift @argv;
829 my $info = $CMD{$cmd} // do { # filter matching commands
830 @argv or puts $self, grep(/\A\Q$cmd\E/, keys %CMD);
833 my ($proto, undef, @spec) = @$info;
835 my $re = defined($cur) ? qr/\A\Q$cur\E/ : qr/./;
836 if (substr(my $_cur = $cur // '-', 0, 1) eq '-') { # --switches
837 # gross special case since the only git-config options
838 # Consider moving to a table if we need more special cases
839 # we use Getopt::Long for are the ones we reject, so these
840 # are the ones we don't reject:
841 if ($cmd eq 'config') {
842 puts $self, grep(/$re/, keys %CONFIG_KEYS);
843 @spec = qw(add z|null get get-all unset unset-all
844 replace-all get-urlmatch
845 remove-section rename-section
846 name-only list|l edit|e
847 get-color-name get-colorbool);
850 # generate short/long names from Getopt::Long specs
851 puts $self, grep(/$re/, qw(--help -h -C), map {
852 if (s/[:=].+\z//) { # req/optional args, e.g output|o=i
853 } elsif (s/\+\z//) { # verbose|v+
855 # negation: mail! => no-mail|mail
856 s/([\w\-]+)/$1|no-$1/g
859 my $x = length > 1 ? "--$_" : "-$_";
860 $x eq $_cur ? () : $x;
861 } grep(!/_/, split(/\|/, $_, -1)) # help|h
862 } grep { $OPTDESC{"$_\t$cmd"} || $OPTDESC{$_} } @spec);
863 } elsif ($cmd eq 'config' && !@argv && !$CONFIG_KEYS{$cur}) {
864 puts $self, grep(/$re/, keys %CONFIG_KEYS);
867 # switch args (e.g. lei q -f mbox<TAB>)
868 if (($argv[-1] // $cur // '') =~ /\A--?([\w\-]+)\z/) {
869 my $opt = quotemeta $1;
871 my $v = $OPTDESC{$_};
872 my @v = ref($v) ? split(/\|/, $v->[0]) : ();
873 # get rid of ALL CAPS placeholder (e.g "OUT")
874 # (TODO: completion for external paths)
875 shift(@v) if scalar(@v) && uc($v[0]) eq $v[0];
877 } grep(/\A(?:[\w-]+\|)*$opt\b.*?(?:\t$cmd)?\z/, keys %OPTDESC);
879 if (my $cb = lazy_cb($self, $cmd, '_complete_')) {
880 puts $self, $cb->($self, @argv, $cur ? ($cur) : ());
882 # TODO: URLs, pathnames, OIDs, MIDs, etc... See optparse() for
887 my ($argv, $env) = @_;
888 my $argc = scalar @$argv;
889 my $buf = 'exec '.join("\0", scalar(@$argv), @$argv);
890 while (my ($k, $v) = each %$env) { $buf .= "\0$k=$v" };
896 my $mua = $self->{opt}->{mua} // return;
897 my $mfolder = $self->{ovv}->{dst};
898 my (@cmd, $replaced);
899 if ($mua =~ /\A(?:mutt|mailx|mail|neomutt)\z/) {
901 # TODO: help wanted: other common FOSS MUAs
903 require Text::ParseWords;
904 @cmd = Text::ParseWords::shellwords($mua);
905 # mutt uses '%f' for open-hook with compressed mbox, we follow
906 @cmd = map { $_ eq '%f' ? ($replaced = $mfolder) : $_ } @cmd;
908 push @cmd, $mfolder unless defined($replaced);
909 if ($self->{sock}) { # lei(1) client process runs it
910 # restore terminal: echo $query | lei q -stdin --mua=...
912 $io->[0] = $self->{1} if $self->{opt}->{stdin} && -t $self->{1};
913 send_exec_cmd($self, $io, \@cmd, {});
915 if ($self->{lxs} && $self->{au_done}) { # kick wait_startq
916 syswrite($self->{au_done}, 'q' x ($self->{lxs}->{jobs} // 0));
918 return unless -t $self->{2}; # XXX how to determine non-TUI MUAs?
919 $self->{opt}->{quiet} = 1;
920 delete $self->{-progress};
921 delete $self->{opt}->{verbose};
924 sub send_exec_cmd { # tell script/lei to execute a command
925 my ($self, $io, $cmd, $env) = @_;
926 my $sock = $self->{sock} // die 'lei client gone';
927 my $fds = [ map { fileno($_) } @$io ];
928 $send_cmd->($sock, $fds, exec_buf($cmd, $env), MSG_EOR);
931 sub poke_mua { # forces terminal MUAs to wake up and hopefully notice new mail
933 my $alerts = $self->{opt}->{alert} // return;
934 my $sock = $self->{sock};
935 while (my $op = shift(@$alerts)) {
936 if ($op eq ':WINCH') {
937 # hit the process group that started the MUA
938 send($sock, '-WINCH', MSG_EOR) if $sock;
939 } elsif ($op eq ':bell') {
941 } elsif ($op =~ /(?<!\\),/) { # bare ',' (not ',,')
942 push @$alerts, split(/(?<!\\),/, $op);
943 } elsif ($op =~ m!\A([/a-z0-9A-Z].+)!) {
944 my $cmd = $1; # run an arbitrary command
945 require Text::ParseWords;
946 $cmd = [ Text::ParseWords::shellwords($cmd) ];
947 send($sock, exec_buf($cmd, {}), MSG_EOR) if $sock;
949 err($self, "W: unsupported --alert=$op"); # non-fatal
954 my %path_to_fd = ('/dev/stdin' => 0, '/dev/stdout' => 1, '/dev/stderr' => 2);
955 $path_to_fd{"/dev/fd/$_"} = $_ for (0..2);
957 # this also normalizes the path
959 my ($self, $path) = @_;
960 $path = rel2abs($self, $path);
962 $path_to_fd{$path} // (
963 ($path =~ m!\A/(?:dev|proc/self)/fd/[0-9]+\z!) ?
964 fail($self, "cannot open $path from daemon") : -1
968 # caller needs to "-t $self->{1}" to check if tty
971 my $fh = popen_rd([qw(git var GIT_PAGER)]);
972 chomp(my $pager = <$fh> // '');
973 close($fh) or warn "`git var PAGER' error: \$?=$?";
974 return if $pager eq 'cat' || $pager eq '';
975 my $new_env = { LESS => 'FRX', LV => '-c' };
976 $new_env->{MORE} = 'FRX' if $^O eq 'freebsd';
977 pipe(my ($r, $wpager)) or return warn "pipe: $!";
978 my $rdr = { 0 => $r, 1 => $self->{1}, 2 => $self->{2} };
979 my $pgr = [ undef, @$rdr{1, 2} ];
980 my $env = $self->{env};
981 if ($self->{sock}) { # lei(1) process runs it
982 delete @$new_env{keys %$env}; # only set iff unset
983 send_exec_cmd($self, [ @$rdr{0..2} ], [$pager], $new_env);
985 die 'BUG: start_pager w/o socket';
987 $self->{1} = $wpager;
988 $self->{2} = $wpager if -t $self->{2};
989 $env->{GIT_PAGER_IN_USE} = 'true'; # we may spawn git
995 my $pgr = delete($self->{pgr}) or return;
996 $self->{2} = $pgr->[2];
997 # do not restore original stdout, just close it so we error out
998 close(delete($self->{1})) if $self->{1};
1001 sub accept_dispatch { # Listener {post_accept} callback
1002 my ($sock) = @_; # ignore other
1003 $sock->autoflush(1);
1004 my $self = bless { sock => $sock }, __PACKAGE__;
1005 vec(my $rvec = '', fileno($sock), 1) = 1;
1006 select($rvec, undef, undef, 60) or
1007 return send($sock, 'timed out waiting to recv FDs', MSG_EOR);
1008 # (4096 * 33) >MAX_ARG_STRLEN
1009 my @fds = $recv_cmd->($sock, my $buf, 4096 * 33) or return; # EOF
1010 if (!defined($fds[0])) {
1011 warn(my $msg = "recv_cmd failed: $!");
1012 return send($sock, $msg, MSG_EOR);
1016 open($self->{$i++}, '+<&=', $fd) and next;
1017 send($sock, "open(+<&=$fd) (FD=$i): $!", MSG_EOR);
1019 $i == 4 or return send($sock, 'not enough FDs='.($i-1), MSG_EOR)
1021 # $ENV_STR = join('', map { "\0$_=$ENV{$_}" } keys %ENV);
1022 # $buf = "$argc\0".join("\0", @ARGV).$ENV_STR."\0\0";
1023 substr($buf, -2, 2, '') eq "\0\0" or # s/\0\0\z//
1024 return send($sock, 'request command truncated', MSG_EOR);
1025 my ($argc, @argv) = split(/\0/, $buf, -1);
1027 my %env = map { split(/=/, $_, 2) } splice(@argv, $argc);
1028 if (chdir($self->{3})) {
1030 $self->{env} = \%env;
1031 eval { dispatch($self, @argv) };
1032 send($sock, $@, MSG_EOR) if $@;
1034 send($sock, "fchdir: $!", MSG_EOR); # implicit close
1040 delete $self->{-progress};
1042 close(delete $self->{1}) if $self->{1}; # may reap_compress
1043 $self->close if $self->{-event_init_done}; # PublicInbox::DS::close
1046 # for long-running results
1049 local %ENV = %{$self->{env}};
1050 my $sock = $self->{sock};
1051 local $current_lei = $self;
1053 while (my @fds = $recv_cmd->($sock, my $buf, 4096)) {
1054 if (scalar(@fds) == 1 && !defined($fds[0])) {
1055 return if $! == EAGAIN;
1056 next if $! == EINTR;
1057 last if $! == ECONNRESET;
1061 open my $rfh, '+<&=', $fd;
1063 die "unrecognized client signal: $buf";
1068 eval { $self->fail($err) };
1073 sub event_step_init {
1075 return if $self->{-event_init_done}++;
1076 if (my $sock = $self->{sock}) { # using DS->EventLoop
1077 $self->SUPER::new($sock, EPOLLIN|EPOLLET);
1083 sub oldset { $oldset }
1085 sub dump_and_clear_log {
1086 if (defined($errors_log) && -s STDIN && seek(STDIN, 0, SEEK_SET)) {
1088 unshift(@pfx, "$errors_log ") if @pfx;
1089 warn @pfx, do { local $/; <STDIN> };
1090 truncate(STDIN, 0) or warn "ftruncate ($errors_log): $!";
1094 # lei(1) calls this when it can't connect
1096 my ($path, $errno, $narg) = @_;
1097 local ($errors_log, $listener);
1098 my ($sock_dir) = ($path =~ m!\A(.+?)/[^/]+\z!);
1099 $errors_log = "$sock_dir/errors.log";
1100 my $addr = pack_sockaddr_un($path);
1101 my $lk = bless { lock_path => $errors_log }, 'PublicInbox::Lock';
1103 socket($listener, AF_UNIX, SOCK_SEQPACKET, 0) or die "socket: $!";
1104 if ($errno == ECONNREFUSED || $errno == ENOENT) {
1105 return if connect($listener, $addr); # another process won
1106 if ($errno == ECONNREFUSED && -S $path) {
1107 unlink($path) or die "unlink($path): $!";
1110 $! = $errno; # allow interpolation to stringify in die
1111 die "connect($path): $!";
1113 umask(077) // die("umask(077): $!");
1114 bind($listener, $addr) or die "bind($path): $!";
1115 listen($listener, 1024) or die "listen: $!";
1118 my @st = stat($path) or die "stat($path): $!";
1119 my $dev_ino_expect = pack('dd', $st[0], $st[1]); # dev+ino
1120 local $oldset = PublicInbox::DS::block_signals();
1122 $send_cmd = PublicInbox::Spawn->can('send_cmd4');
1123 $recv_cmd = PublicInbox::Spawn->can('recv_cmd4') // do {
1124 require PublicInbox::CmdIPC4;
1125 $send_cmd = PublicInbox::CmdIPC4->can('send_cmd4');
1126 PublicInbox::CmdIPC4->can('recv_cmd4');
1129 $recv_cmd or die <<"";
1130 (Socket::MsgHdr || Inline::C) missing/unconfigured (narg=$narg);
1132 require PublicInbox::Listener;
1133 require PublicInbox::PktOp;
1134 (-p STDOUT) or die "E: stdout must be a pipe\n";
1135 open(STDIN, '+>>', $errors_log) or die "open($errors_log): $!";
1136 STDIN->autoflush(1);
1137 dump_and_clear_log("from previous daemon process:\n");
1138 POSIX::setsid() > 0 or die "setsid: $!";
1139 my $pid = fork // die "fork: $!";
1141 $0 = "lei-daemon $path";
1143 $listener->blocking(0);
1145 my $pil = PublicInbox::Listener->new($listener, \&accept_dispatch);
1147 my (undef, $eof_p) = PublicInbox::PktOp->pair;
1149 $exit_code //= shift;
1150 my $lis = $pil or exit($exit_code);
1151 # closing eof_p triggers \&noop wakeup
1152 $listener = $eof_p = $pil = $path = undef;
1153 $lis->close; # DS::close
1154 PublicInbox::DS->SetLoopTimeout(1000);
1158 CHLD => \&PublicInbox::DS::enqueue_reap,
1166 my $sigfd = PublicInbox::Sigfd->new($sig, SFD_NONBLOCK);
1167 local @SIG{keys %$sig} = values(%$sig) unless $sigfd;
1169 local $SIG{PIPE} = 'IGNORE';
1170 require PublicInbox::DirIdle;
1171 local $dir_idle = PublicInbox::DirIdle->new([$sock_dir], sub {
1172 # just rely on wakeup ot hit PostLoopCallback set below
1173 _dir_idle_handler(@_) if $_[0]->fullname ne $path;
1176 undef $sigfd; # unref, already in DS::DescriptorMap
1178 # wake up every second to accept signals if we don't
1179 # have signalfd or IO::KQueue:
1180 PublicInbox::DS::sig_setmask($oldset);
1181 PublicInbox::DS->SetLoopTimeout(1000);
1183 PublicInbox::DS->SetPostLoopCallback(sub {
1184 my ($dmap, undef) = @_;
1185 if (@st = defined($path) ? stat($path) : ()) {
1186 if ($dev_ino_expect ne pack('dd', $st[0], $st[1])) {
1187 warn "$path dev/ino changed, quitting\n";
1190 } elsif (defined($path)) { # ENOENT is common
1191 warn "stat($path): $!, quitting ...\n" if $! != ENOENT;
1195 return 1 if defined($path);
1198 for my $s (values %$dmap) {
1199 $s->can('busy') or next;
1200 if ($s->busy($now)) {
1206 $n; # true: continue, false: stop
1209 # STDIN was redirected to /dev/null above, closing STDERR and
1210 # STDOUT will cause the calling `lei' client process to finish
1211 # reading the <$daemon> pipe.
1212 local $SIG{__WARN__} = sub {
1213 $current_lei ? err($current_lei, @_) : warn(
1214 strftime('%Y-%m-%dT%H:%M:%SZ', gmtime(time))," $$ ", @_);
1216 open STDERR, '>&STDIN' or die "redirect stderr failed: $!";
1217 open STDOUT, '>&STDIN' or die "redirect stdout failed: $!";
1218 # $daemon pipe to `lei' closed, main loop begins:
1219 PublicInbox::DS->EventLoop;
1220 exit($exit_code // 0);
1223 sub busy { 1 } # prevent daemon-shutdown if client is connected
1225 # ensures stdout hits the FS before sock disconnects so a client
1226 # can immediately reread it
1229 $self->{1}->autoflush(1) if $self->{1};
1231 # preserve $? for ->fail or ->x_it code
1234 sub wq_done_wait { # dwaitpid callback
1235 my ($arg, $pid) = @_;
1236 my ($wq, $lei) = @$arg;
1237 my $err_type = $lei->{-err_type};
1238 $? and $lei->child_error($?,
1239 $err_type ? "$err_type errors during $lei->{cmd}" : ());
1243 sub wq_eof { # EOF callback for main daemon
1245 my $wq1 = delete $lei->{wq1} // return $lei->fail; # already failed
1246 $wq1->wq_wait_old(\&wq_done_wait, $lei);