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 $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
39 our $MDIR2CFGPATH; # /path/to/maildir => { /path/to/config => undef }
41 # TBD: this is a documentation mechanism to show a subcommand
42 # (may) pass options through to another command:
43 sub pass_through { $GLP_PASS }
47 my ($spec, $re_str) = @_; # 'limit|n=i', '([0-9]+)'
48 my ($key) = ($spec =~ m/\A([a-z]+)/g);
49 my $cb = sub { # Getopt::Long "<>" catch-all handler
51 if ($arg =~ /\A-($re_str)\z/) {
53 } elsif ($arg eq '--') { # "--" arg separator, ignore first
54 push @{$OPT->{-argv}}, $arg if $OPT->{'--'}++;
55 # lone (single) dash is handled elsewhere
56 } elsif (substr($arg, 0, 1) eq '-') {
58 push @{$OPT->{-argv}}, $arg;
60 die "bad argument: $arg\n";
63 push @{$OPT->{-argv}}, $arg;
66 ($spec, '<>' => $cb, $GLP_PASS) # for Getopt::Long
69 # rel2abs preserves symlinks in parent, unlike abs_path
72 if (index($p, '/') == 0) { # already absolute
73 $p =~ tr!/!/!s; # squeeze redundant slashes
74 chop($p) if substr($p, -1, 1) eq '/';
77 my $pwd = $self->{env}->{PWD};
80 my $xcwd = $self->{3} //
81 ($cwd = getcwd() // die "getcwd(PWD=$pwd): $!");
82 if (my @st_pwd = stat($pwd)) {
83 my @st_cwd = stat($xcwd) or die "stat($xcwd): $!";
84 "@st_pwd[1,0]" eq "@st_cwd[1,0]" or
85 $self->{env}->{PWD} = $pwd = undef;
86 } else { # PWD was invalid
87 $self->{env}->{PWD} = $pwd = undef;
90 $pwd //= $self->{env}->{PWD} = $cwd // getcwd() // die "getcwd: $!";
91 File::Spec->rel2abs($p, $pwd);
94 # abs_path resolves symlinks in parent iff all parents exist
95 sub abs_path { Cwd::abs_path($_[1]) // rel2abs(@_) }
97 sub share_path ($) { # $HOME/.local/share/lei/$FOO
99 rel2abs($self, ($self->{env}->{XDG_DATA_HOME} //
100 ($self->{env}->{HOME} // '/nonexistent').'/.local/share')
104 sub store_path ($) { share_path($_[0]) . '/store' }
106 sub _config_path ($) {
108 rel2abs($self, ($self->{env}->{XDG_CONFIG_HOME} //
109 ($self->{env}->{HOME} // '/nonexistent').'/.config')
115 rel2abs($self, ($self->{env}->{XDG_CACHE_HOME} //
116 ($self->{env}->{HOME} // '/nonexistent').'/.cache')
120 sub url_folder_cache {
122 require PublicInbox::SharedKV; # URI => updated_at_sec_
123 PublicInbox::SharedKV->new(cache_dir($self).'/uri_folder');
128 $self->{ale} //= do {
129 require PublicInbox::LeiALE;
130 $self->_lei_cfg(1)->{ale} //= PublicInbox::LeiALE->new($self);
135 # TODO: drop underscore variants everywhere, they're undocumented
136 qw(fsync|sync! jobs|j=i indexlevel|L=s compact
137 max_size|max-size=s sequential_shard|sequential-shard
138 batch_size|batch-size=s skip-docdata)
141 my @c_opt = qw(c=s@ C=s@ quiet|q);
142 my @lxs_opt = (qw(remote! local! external! include|I=s@ exclude=s@ only=s@
143 import-remote! no-torsocks torsocks=s),
144 PublicInbox::LeiQuery::curl_opt());
146 # we don't support -C as an alias for --find-copies since it's already
148 our @diff_opt = qw(unified|U=i output-indicator-new=s output-indicator-old=s
149 output-indicator-context=s indent-heuristic!
150 minimal patience histogram anchored=s@ diff-algorithm=s
151 color-moved:s color-moved-ws=s no-color-moved no-color-moved-ws
152 word-diff:s word-diff-regex=s color-words:s no-renames
153 rename-empty! check ws-error-highlight=s full-index binary
154 abbrev:i break-rewrites|B:s find-renames|M:s find-copies:s
155 find-copies-harder irreversible-delete|D l=i diff-filter=s
156 S=s G=s find-object=s pickaxe-all pickaxe-regex O=s R
157 relative:s text|a ignore-cr-at-eol ignore-space-at-eol
158 ignore-space-change|b ignore-all-space|w ignore-blank-lines
159 inter-hunk-context=i function-context|W exit-code ext-diff
160 no-ext-diff textconv! src-prefix=s dst-prefix=s no-prefix
163 # we generate shell completion + help using %CMD and %OPTDESC,
164 # see lei__complete() and PublicInbox::LeiHelp
165 # command => [ positional_args, 1-line description, Getopt::Long option spec ]
166 our %CMD = ( # sorted in order of importance/use:
167 'q' => [ '--stdin|SEARCH_TERMS...', 'search for messages matching terms',
168 'stdin|', # /|\z/ must be first for lone dash
170 qw(save output|mfolder|o=s format|f=s dedupe|d=s threads|t+
171 sort|s=s reverse|r offset=i pretty jobs|j=s globoff|g augment|a
172 import-before! lock=s@ rsyncable alert=s@ mua=s verbose|v+
173 shared color! mail-sync!), @c_opt, opt_dash('limit|n=i', '[0-9]+') ],
175 'up' => [ 'OUTPUT|--all', 'update saved search',
176 qw(jobs|j=s lock=s@ alert=s@ mua=s verbose|v+ all:s), @c_opt ],
178 'lcat' => [ '--stdin|MSGID_OR_URL...', 'display local copy of message(s)',
179 'stdin|', # /|\z/ must be first for lone dash
180 # some of these options are ridiculous for lcat
181 @lxs_opt, qw(output|mfolder|o=s format|f=s dedupe|d=s threads|t+
182 sort|s=s reverse|r offset=i jobs|j=s globoff|g augment|a
183 import-before! lock=s@ rsyncable alert=s@ mua=s verbose|v+
184 color!), @c_opt, opt_dash('limit|n=i', '[0-9]+') ],
186 'blob' => [ 'OID', 'show a git blob, reconstructing from mail if necessary',
187 qw(git-dir=s@ cwd! verbose|v+ mail! oid-a|A=s path-a|a=s path-b|b=s),
190 'rediff' => [ '--stdin|LOCATION...',
191 'regenerate a diff with different options',
192 'stdin|', # /|\z/ must be first for lone dash
193 qw(git-dir=s@ cwd! verbose|v+ color:s no-color),
194 @diff_opt, @lxs_opt, @c_opt ],
196 'add-external' => [ 'LOCATION',
197 'add/set priority of a publicinbox|extindex for extra matches',
198 qw(boost=i mirror=s no-torsocks torsocks=s inbox-version=i
199 verbose|v+), @c_opt, index_opt(),
200 PublicInbox::LeiQuery::curl_opt() ],
201 'ls-external' => [ '[FILTER]', 'list publicinbox|extindex locations',
202 qw(format|f=s z|0 globoff|g invert-match|v local remote), @c_opt ],
203 'ls-label' => [ '', 'list labels', qw(z|0 stats:s), @c_opt ],
204 'ls-mail-sync' => [ '[FILTER]', 'list mail sync folders',
205 qw(z|0 globoff|g invert-match|v local remote), @c_opt ],
206 'ls-mail-source' => [ 'URL', 'list IMAP or NNTP mail source folders',
207 qw(z|0 ascii l url), @c_opt ],
208 'forget-external' => [ 'LOCATION...|--prune',
209 'exclude further results from a publicinbox|extindex',
212 'ls-search' => [ '[PREFIX]', 'list saved search queries',
213 qw(format|f=s pretty l ascii z|0), @c_opt ],
214 'forget-search' => [ 'OUTPUT', 'forget a saved search',
215 qw(verbose|v+), @c_opt ],
216 'edit-search' => [ 'OUTPUT', "edit saved search via `git config --edit'",
218 'rm' => [ '--stdin|LOCATION...',
219 'remove a message from the index and prevent reindexing',
220 'stdin|', # /|\z/ must be first for lone dash
222 'plonk' => [ '--threads|--from=IDENT',
223 'exclude mail matching From: or threads from non-Message-ID searches',
224 qw(stdin| threads|t from|f=s mid=s oid=s), @c_opt ],
225 'tag' => [ 'KEYWORDS...',
226 'set/unset keywords and/or labels on message(s)',
227 qw(stdin| in-format|F=s input|i=s@ oid=s@ mid=s@),
228 qw(no-torsocks torsocks=s), PublicInbox::LeiQuery::curl_opt(), @c_opt,
229 pass_through('-kw:foo for delete') ],
231 'purge-mailsource' => [ 'LOCATION|--all',
232 'remove imported messages from IMAP, Maildirs, and MH',
233 qw(exact! all jobs:i indexed), @c_opt ],
235 'add-watch' => [ 'LOCATION', 'watch for new messages and flag changes',
236 qw(poll-interval=s state=s recursive|r), @c_opt ],
237 'ls-watch' => [ '[FILTER...]', 'list active watches with numbers and status',
239 'pause-watch' => [ '[WATCH_NUMBER_OR_FILTER]', qw(all local remote), @c_opt ],
240 'resume-watch' => [ '[WATCH_NUMBER_OR_FILTER]', qw(all local remote), @c_opt ],
241 'forget-watch' => [ '{WATCH_NUMBER|--prune}', 'stop and forget a watch',
244 'index' => [ 'LOCATION...', 'one-time index from URL or filesystem',
245 qw(in-format|F=s kw! offset=i recursive|r exclude=s include|I=s
246 verbose|v+ incremental!),
247 PublicInbox::LeiQuery::curl_opt(), # mainly for --proxy=
249 'import' => [ 'LOCATION...|--stdin',
250 'one-time import/update from URL or filesystem',
251 qw(stdin| offset=i recursive|r exclude=s include|I=s jobs=s new-only
252 lock=s@ in-format|F=s kw! verbose|v+ incremental! mail-sync!),
253 qw(no-torsocks torsocks=s), PublicInbox::LeiQuery::curl_opt(), @c_opt ],
254 'forget-mail-sync' => [ 'LOCATION...',
255 'forget sync information for a mail folder', @c_opt ],
256 'prune-mail-sync' => [ 'LOCATION...|--all',
257 'prune dangling sync data for a mail folder', 'all:s', @c_opt ],
258 'export-kw' => [ 'LOCATION...|--all',
259 'one-time export of keywords of sync sources',
260 qw(all:s mode=s), @c_opt ],
261 'convert' => [ 'LOCATION...|--stdin',
262 'one-time conversion from URL or filesystem to another format',
263 qw(stdin| in-format|F=s out-format|f=s output|mfolder|o=s lock=s@ kw!),
264 qw(no-torsocks torsocks=s), PublicInbox::LeiQuery::curl_opt(), @c_opt ],
265 'p2q' => [ 'FILE|COMMIT_OID|--stdin',
266 "use a patch to generate a query for `lei q --stdin'",
267 qw(stdin| want|w=s@ uri debug), @c_opt ],
268 'config' => [ '[...]', sub {
269 'git-config(1) wrapper for '._config_path($_[0]);
270 }, qw(config-file|system|global|file|f=s), # for conflict detection
271 qw(c=s@ C=s@), pass_through('git config') ],
272 'inspect' => [ 'ITEMS...', 'inspect lei/store and/or local external',
273 qw(pretty ascii dir=s), @c_opt ],
275 'init' => [ '[DIRNAME]', sub {
276 "initialize storage, default: ".store_path($_[0]);
278 'daemon-kill' => [ '[-SIGNAL]', 'signal the lei-daemon',
279 # "-C DIR" conflicts with -CHLD, here, and chdir makes no sense, here
280 opt_dash('signal|s=s', '[0-9]+|(?:[A-Z][A-Z0-9]+)') ],
281 'daemon-pid' => [ '', 'show the PID of the lei-daemon' ],
282 'help' => [ '[SUBCOMMAND]', 'show help' ],
285 #'reorder-local-store-and-break-history' => [ '[REFNAME]',
286 # 'rewrite git history in an attempt to improve compression',
288 #'fuse-mount' => [ 'PATHNAME', 'expose lei/store as Maildir(s)', @c_opt ],
290 # internal commands are prefixed with '_'
291 '_complete' => [ '[...]', 'internal shell completion helper',
292 pass_through('everything') ],
295 # switch descriptions, try to keep consistent across commands
296 # $spec: Getopt::Long option specification
297 # $spec => [@ALLOWED_VALUES (default is first), $description],
298 # $spec => $description
299 # "$SUB_COMMAND TAB $spec" => as above
300 my $stdin_formats = [ 'MAIL_FORMAT|eml|mboxrd|mboxcl2|mboxcl|mboxo',
301 'specify message input format' ];
302 my $ls_format = [ 'OUT|plain|json|null', 'listing output format' ];
304 # we use \x{a0} (non-breaking SP) to avoid wrapping in PublicInbox::LeiHelp
306 'help|h' => 'show this built-in help',
307 'c=s@' => [ 'NAME=VALUE', 'set config option' ],
308 'C=s@' => [ 'DIR', 'chdir to specify to directory' ],
309 'quiet|q' => 'be quiet',
310 'lock=s@' => [ 'METHOD|dotlock|fcntl|flock|none',
311 'mbox(5) locking method(s) to use (default: fcntl,dotlock)' ],
313 'incremental! import' => 'import already seen IMAP and NNTP articles',
314 'globoff|g' => "do not match locations using '*?' wildcards ".
315 "and\xa0'[]'\x{a0}ranges",
316 'invert-match|v' => 'select non-matching lines',
317 'color!' => 'disable color (for --format=text)',
318 'verbose|v+' => 'be more verbose',
319 'external!' => 'do not use externals',
320 'mail!' => 'do not look in mail storage for OID',
321 'cwd!' => 'do not look in git repo of current working directory',
322 'oid-a|A=s' => 'pre-image OID',
323 'path-a|a=s' => 'pre-image pathname associated with OID',
324 'path-b|b=s' => 'post-image pathname associated with OID',
325 'git-dir=s@' => 'additional git repository to scan',
326 'dir=s inspect' => 'specify a inboxdir, extindex topdir or Xapian shard',
327 'proxy=s' => [ 'PROTO://HOST[:PORT]', # shared with curl(1)
328 "proxy for (e.g. `socks5h://0:9050')" ],
329 'torsocks=s' => ['VAL|auto|no|yes',
330 'whether or not to wrap git and curl commands with torsocks'],
331 'no-torsocks' => 'alias for --torsocks=no',
332 'save' => "save a search for `lei up'",
333 'import-remote!' => 'do not memoize remote messages into local store',
335 'type=s' => [ 'any|mid|git', 'disambiguate type' ],
337 'dedupe|d=s' => ['STRATEGY|content|oid|mid|none',
338 'deduplication strategy'],
340 'return all messages in the same threads as the actual match(es)',
342 'want|w=s@' => [ 'PREFIX|dfpost|dfn', # common ones in help...
343 'search prefixes to extract (default: dfpost7)' ],
345 'alert=s@' => ['CMD,:WINCH,:bell,<any command>',
346 'run command(s) or perform ops when done writing to output ' .
347 '(default: ":WINCH,:bell" with --mua and Maildir/IMAP output, ' .
348 'nothing otherwise)' ],
350 'augment|a' => 'augment --output destination instead of clobbering',
352 'output|mfolder|o=s' => [ 'MFOLDER',
353 "destination (e.g.\xa0`/path/to/Maildir', ".
354 "or\xa0`-'\x{a0}for\x{a0}stdout)" ],
356 "MUA to run on --output Maildir or mbox (e.g.\xa0`mutt\xa0-f\xa0%f')" ],
357 'new-only import' => 'only import new messages from IMAP source',
359 'inbox-version=i' => [ 'NUM|1|2',
360 'force a public-inbox version with --mirror'],
361 'mirror=s' => [ 'URL', 'mirror a public-inbox'],
363 # public-inbox-index options
364 'fsync!' => 'speed up indexing after --mirror, risk index corruption',
365 'compact' => 'run compact index after mirroring',
366 'indexlevel|L=s' => [ 'LEVEL|full|medium|basic',
367 "indexlevel with --mirror (default: full)" ],
368 'max_size|max-size=s' => [ 'SIZE',
369 'do not index messages larger than SIZE (default: infinity)' ],
370 'batch_size|batch-size=s' => [ 'SIZE',
371 'flush changes to OS after given number of bytes (default: 1m)' ],
372 'sequential_shard|sequential-shard' =>
373 'index Xapian shards sequentially for slow storage',
375 'drop compatibility w/ public-inbox <1.6 to save ~1.5% space',
378 'OUT|maildir|mboxrd|mboxcl2|mboxcl|mboxo|html|json|jsonl|concatjson',
379 'specify output format, default depends on --output'],
380 'exclude=s@ q' => [ 'LOCATION',
381 'exclude specified external(s) from search' ],
382 'include|I=s@ q' => [ 'LOCATION',
383 'include specified external(s) in search' ],
384 'only=s@ q' => [ 'LOCATION',
385 'only use specified external(s) for search' ],
386 'jobs=s q' => [ '[SEARCH_JOBS][,WRITER_JOBS]',
387 'control number of search and writer jobs' ],
388 'jobs|j=i add-external' => 'set parallelism when indexing after --mirror',
390 'in-format|F=s' => $stdin_formats,
391 'format|f=s ls-search' => ['OUT|json|jsonl|concatjson',
392 'listing output format' ],
393 'l ls-search' => 'long listing format',
394 'l ls-watch' => 'long listing format',
395 'l ls-mail-source' => 'long listing format',
396 'url ls-mail-source' => 'show full URL of newsgroup or IMAP folder',
397 'format|f=s ls-external' => $ls_format,
399 'limit|n=i@' => ['NUM', 'limit on number of matches (default: 10000)' ],
400 'offset=i' => ['OFF', 'search result offset (default: 0)'],
402 'sort|s=s' => [ 'VAL|received|relevance|docid',
403 "order of results is `--output'-dependent"],
404 'reverse|r' => 'reverse search results', # like sort(1)
406 'boost=i' => 'increase/decrease priority of results (default: 0)',
408 'local' => 'limit operations to the local filesystem',
409 'local!' => 'exclude results from the local filesystem',
410 'remote' => 'limit operations to those requiring network access',
411 'remote!' => 'prevent operations requiring network access',
413 'all:s up' => ['local', 'update all (local) saved searches' ],
415 'mid=s' => 'specify the Message-ID of a message',
416 'oid=s' => 'specify the git object ID of a message',
418 'recursive|r' => 'scan directories/mailboxes/newsgroups recursively',
419 'exclude=s' => 'exclude mailboxes/newsgroups based on pattern',
420 'include=s' => 'include mailboxes/newsgroups based on pattern',
422 'exact' => 'operate on exact header matches only',
423 'exact!' => 'rely on content match instead of exact header matches',
425 'by-mid|mid:s' => [ 'MID', 'match only by Message-ID, ignoring contents' ],
427 'kw!' => 'disable/enable importing keywords (aka "flags")',
429 # xargs, env, use "-0", git(1) uses "-z". We support z|0 everywhere
430 'z|0' => 'use NUL \\0 instead of newline (CR) to delimit lines',
432 'signal|s=s' => [ 'SIG', 'signal to send lei-daemon (default: TERM)' ],
436 'leistore.dir' => 'top-level storage location',
439 my @WQ_KEYS = qw(lxs l2m ikw pmd wq1 lne); # internal workers
443 for my $wq (grep(defined, delete(@$self{@WQ_KEYS}))) {
445 $wq->wq_close(0, undef, $self);
446 } elsif ($wq->wq_kill_old) {
447 $wq->wq_wait_old(undef, $self);
453 # pronounced "exit": x_it(1 << 8) => exit(1); x_it(13) => SIGPIPE
455 my ($self, $code) = @_;
456 # make sure client sees stdout before exit
457 $self->{1}->autoflush(1) if $self->{1};
458 dump_and_clear_log();
460 if ($self->{pkt_op_p}) { # to top lei-daemon
461 $self->{pkt_op_p}->pkt_do('x_it', $code);
462 } elsif ($self->{sock}) { # to lei(1) client
463 send($self->{sock}, "x_it $code", MSG_EOR);
464 } # else ignore if client disconnected
469 my $err = $self->{2} // ($self->{pgr} // [])->[2] // *STDERR{GLOB};
470 my @eor = (substr($_[-1]//'', -1, 1) eq "\n" ? () : ("\n"));
471 print $err @_, @eor and return;
472 my $old_err = delete $self->{2};
473 close($old_err) if $! == EPIPE && $old_err;
474 $err = $self->{2} = ($self->{pgr} // [])->[2] // *STDERR{GLOB};
475 print $err @_, @eor or print STDERR @_, @eor;
478 sub qerr ($;@) { $_[0]->{opt}->{quiet} or err(shift, @_) }
480 sub fail_handler ($;$$) {
481 my ($lei, $code, $io) = @_;
482 close($io) if $io; # needed to avoid warnings on SIGPIPE
484 x_it($lei, $code // (1 << 8));
487 sub sigpipe_handler { # handles SIGPIPE from @WQ_KEYS workers
488 fail_handler($_[0], 13, delete $_[0]->{1});
491 # PublicInbox::OnDestroy callback for SIGINT to take out the entire pgid
494 dwaitpid($pgid) if kill('-INT', $pgid);
498 my ($self, $buf, $exit_code) = @_;
500 err($self, $buf) if defined $buf;
501 # calls fail_handler:
502 $self->{pkt_op_p}->pkt_do('!') if $self->{pkt_op_p};
503 x_it($self, ($exit_code // 1) << 8);
509 return if print { $self->{1} // return } @_; # likely
510 return note_sigpipe($self, 1) if $! == EPIPE;
511 my $err = "error writing to output: $!";
516 sub puts ($;@) { out(shift, map { "$_\n" } @_) }
518 sub child_error { # passes non-fatal curl exit codes to user
519 my ($self, $child_error, $msg) = @_; # child_error is $?
520 $self->err($msg) if $msg;
521 if ($self->{pkt_op_p}) { # to top lei-daemon
522 $self->{pkt_op_p}->pkt_do('child_error', $child_error);
523 } elsif ($self->{sock}) { # to lei(1) client
524 send($self->{sock}, "child_error $child_error", MSG_EOR);
525 } # else noop if client disconnected
528 sub note_sigpipe { # triggers sigpipe_handler
529 my ($self, $fd) = @_;
530 close(delete($self->{$fd})); # explicit close silences Perl warning
531 $self->{pkt_op_p}->pkt_do('|') if $self->{pkt_op_p};
535 sub _lei_atfork_child {
536 my ($self, $persist) = @_;
537 # we need to explicitly close things which are on stack
539 chdir '/' or die "chdir(/): $!";
540 close($_) for (grep(defined, delete @$self{qw(0 1 2 sock)}));
541 if (my $cfg = $self->{cfg}) {
542 delete @$cfg{qw(-lei_store -watches -lei_note_event)};
544 } else { # worker, Net::NNTP (Net::Cmd) uses STDERR directly
545 open STDERR, '+>&='.fileno($self->{2}) or warn "open $!";
546 STDERR->autoflush(1);
548 close($_) for (grep(defined, delete @$self{qw(3 old_1 au_done)}));
549 if (my $op_c = delete $self->{pkt_op_c}) {
550 close(delete $op_c->{sock});
552 if (my $pgr = delete $self->{pgr}) {
553 close($_) for (@$pgr[1,2]);
555 close $listener if $listener;
560 eval 'no warnings; undef $PublicInbox::LeiNoteEvent::to_flush';
562 $quit = \&CORE::exit;
563 $self->{-eml_noisy} or # only "lei import" sets this atm
564 $SIG{__WARN__} = PublicInbox::Eml::warn_ignore_cb();
565 $current_lei = $persist ? undef : $self; # for SIG{__WARN__}
568 sub _delete_pkt_op { # OnDestroy callback to prevent leaks on die
570 if (my $op = delete $self->{pkt_op_c}) { # in case of die
571 $op->close; # PublicInbox::PktOp::close
573 my $pkt_op_p = delete($self->{pkt_op_p}) or return;
574 close $pkt_op_p->{op_p};
579 require PublicInbox::OnDestroy;
580 require PublicInbox::PktOp;
581 my $end = PublicInbox::OnDestroy->new($$, \&_delete_pkt_op, $self);
582 @$self{qw(pkt_op_c pkt_op_p)} = PublicInbox::PktOp->pair;
587 my ($self, $field, $nr) = @_;
588 $self->{counters}->{$field} += $nr;
592 my ($lei, $wq, $jobs, $ops, $flds) = @_;
594 '!' => [ \&fail_handler, $lei ],
595 '|' => [ \&sigpipe_handler, $lei ],
596 'x_it' => [ \&x_it, $lei ],
597 'child_error' => [ \&child_error, $lei ],
598 'incr' => [ \&incr, $lei ],
601 $ops->{''} //= [ $wq->can('_lei_wq_eof') || \&wq_eof, $lei ];
602 my $end = $lei->pkt_op_pair;
603 my $ident = $wq->{-wq_ident} // "lei-$lei->{cmd} worker";
605 $wq->wq_workers_start($ident, $jobs, $lei->oldset, $flds);
606 delete $lei->{pkt_op_p};
607 my $op_c = delete $lei->{pkt_op_c};
609 $lei->event_step_init;
613 # call this when we're ready to wait on events and yield to other clients
615 my ($lei, $op_c, $ops) = @_;
616 for my $wq (grep(defined, @$lei{qw(ikw pmd)})) { # auxiliary WQs
623 require PublicInbox::LeiHelp;
624 PublicInbox::LeiHelp::call($_[0], $_[1], \%CMD, \%OPTDESC);
628 my ($self, $cmd, $argv) = @_;
629 # allow _complete --help to complete, not show help
630 return 1 if substr($cmd, 0, 1) eq '_';
632 $OPT = $self->{opt} //= {};
633 my $info = $CMD{$cmd} // [ '[...]' ];
634 my ($proto, undef, @spec) = @$info;
635 my $glp = ref($spec[-1]) eq ref($GLP) ? pop(@spec) : $GLP;
636 push @spec, qw(help|h);
638 if ($spec[0] =~ s/\|\z//s) { # "stdin|" or "clear|" allows "-" alias
639 $lone_dash = $spec[0];
640 $OPT->{$spec[0]} = \(my $var);
641 push @spec, '' => \$var;
643 $glp->getoptionsfromarray($argv, $OPT, @spec) or
644 return _help($self, "bad arguments or options for $cmd");
645 return _help($self) if $OPT->{help};
647 push @$argv, @{$OPT->{-argv}} if defined($OPT->{-argv});
649 # "-" aliases "stdin" or "clear"
650 $OPT->{$lone_dash} = ${$OPT->{$lone_dash}} if defined $lone_dash;
653 my $POS_ARG = '[A-Z][A-Z0-9_]+';
655 my @args = split(/ /, $proto);
656 for my $var (@args) {
657 if ($var =~ /\A$POS_ARG\.\.\.\z/o) { # >= 1 args;
658 $inf = defined($argv->[$i]) and last;
659 $var =~ s/\.\.\.\z//;
660 $err = "$var not supplied";
661 } elsif ($var =~ /\A$POS_ARG\z/o) { # required arg at $i
662 $argv->[$i++] // ($err = "$var not supplied");
663 } elsif ($var =~ /\.\.\.\]\z/) { # optional args start
666 } elsif ($var =~ /\A\[-?$POS_ARG\]\z/) { # one optional arg
668 } elsif ($var =~ /\A.+?\|/) { # required FOO|--stdin
669 $inf = 1 if index($var, '...') > 0;
670 my @or = split(/\|/, $var);
673 if ($o =~ /\A--([a-z0-9\-]+)/) {
675 # assume pipe/regular file on stdin
676 # w/o args means stdin
677 if ($sw eq 'stdin' && !@$argv &&
682 $ok = defined($OPT->{$sw});
684 } elsif (defined($argv->[$i])) {
688 } # else continue looping
692 $err = join(', ', @or) . " or $last must be set";
694 warn "BUG: can't parse `$var' in $proto";
698 if (!$inf && scalar(@$argv) > scalar(@args)) {
699 $err //= 'too many arguments';
701 $err ? fail($self, "usage: lei $cmd $proto\nE: $err") : 1;
704 sub _tmp_cfg { # for lei -c <name>=<value> ...
706 my $cfg = _lei_cfg($self, 1);
708 my $ft = File::Temp->new(TEMPLATE => 'lei_cfg-XXXX', TMPDIR => 1);
709 my $tmp = { '-f' => $ft->filename, -tmp => $ft };
711 print $ft <<EOM or return fail($self, "$tmp->{-f}: $!");
715 $tmp = $self->{cfg} = bless { %$cfg, %$tmp }, ref($cfg);
716 for (@{$self->{opt}->{c}}) {
717 /\A([^=\.]+\.[^=]+)(?:=(.*))?\z/ or return fail($self, <<EOM);
718 `-c $_' is not of the form -c <name>=<value>'
722 _config($self, '--add', $name, $value);
723 if (defined(my $v = $tmp->{$name})) {
724 if (ref($v) eq 'ARRAY') {
727 $tmp->{$name} = [ $v, $value ];
730 $tmp->{$name} = $value;
736 my ($self, $cmd, $pfx) = @_;
740 $cb = $self->can($pfx.$ucmd) and return $cb;
742 $base =~ s/_([a-z])/\u$1/g;
743 my $pkg = "PublicInbox::Lei\u$base";
744 ($INC{"PublicInbox/Lei\u$base.pm"} // eval("require $pkg")) ?
745 $pkg->can($pfx.$ucmd) : undef;
749 my ($self, $cmd, @argv) = @_;
750 local $current_lei = $self; # for __WARN__
751 $self->{2}->autoflush(1); # keep stdout buffered until x_it|DESTROY
752 dump_and_clear_log("from previous run\n");
753 return _help($self, 'no command given') unless defined($cmd);
754 # do not support Getopt bundling for this
755 while ($cmd eq '-C' || $cmd eq '-c') {
756 my $v = shift(@argv) // return fail($self, $cmd eq '-C' ?
757 '-C DIRECTORY' : '-c <name>=<value>');
758 push @{$self->{opt}->{substr($cmd, 1, 1)}}, $v;
759 $cmd = shift(@argv) // return _help($self, 'no command given');
761 if (my $cb = lazy_cb(__PACKAGE__, $cmd, 'lei_')) {
762 optparse($self, $cmd, \@argv) or return;
763 $self->{opt}->{c} and (_tmp_cfg($self) // return);
764 if (my $chdir = $self->{opt}->{C}) {
765 for my $d (@$chdir) {
766 next if $d eq ''; # same as git(1)
767 chdir $d or return fail($self, "cd $d: $!");
769 open $self->{3}, '.' or return fail($self, "open . $!");
772 } elsif (grep(/\A-/, $cmd, @argv)) { # --help or -h only
773 $GLP->getoptionsfromarray([$cmd, @argv], {}, qw(help|h C=s@))
774 or return _help($self, 'bad arguments or options');
777 fail($self, "`$cmd' is not an lei command");
782 my ($self, $creat) = @_;
783 return $self->{cfg} if $self->{cfg};
784 my $f = _config_path($self);
786 my $cur_st = @st ? pack('dd', $st[10], $st[7]) : ''; # 10:ctime, 7:size
787 my ($sto, $sto_dir, $watches, $lne);
788 if (my $cfg = $PATH2CFG{$f}) { # reuse existing object in common case
789 return ($self->{cfg} = $cfg) if $cur_st eq $cfg->{-st};
790 ($sto, $sto_dir, $watches, $lne) =
791 @$cfg{qw(-lei_store leistore.dir -watches
797 return bless {}, 'PublicInbox::Config';
799 my (undef, $cfg_dir, undef) = File::Spec->splitpath($f);
800 -d $cfg_dir or mkpath($cfg_dir) or die "mkpath($cfg_dir): $!\n";
801 open my $fh, '>>', $f or die "open($f): $!\n";
802 @st = stat($fh) or die "fstat($f): $!\n";
803 $cur_st = pack('dd', $st[10], $st[7]);
804 qerr($self, "# $f created") if $self->{cmd} ne 'config';
806 my $cfg = PublicInbox::Config->git_config_dump($f);
807 $cfg->{-st} = $cur_st;
809 if ($sto && File::Spec->canonpath($sto_dir // store_path($self))
810 eq File::Spec->canonpath($cfg->{'leistore.dir'} //
811 store_path($self))) {
812 $cfg->{-lei_store} = $sto;
813 $cfg->{-lei_note_event} = $lne;
814 $cfg->{-watches} = $watches if $watches;
816 if (scalar(keys %PATH2CFG) > 5) {
817 # FIXME: use inotify/EVFILT_VNODE to detect unlinked configs
818 for my $k (keys %PATH2CFG) {
819 delete($PATH2CFG{$k}) unless -f $k
822 $self->{cfg} = $PATH2CFG{$f} = $cfg;
825 sub _lei_store ($;$) {
826 my ($self, $creat) = @_;
827 my $cfg = _lei_cfg($self, $creat) // return;
828 $cfg->{-lei_store} //= do {
829 require PublicInbox::LeiStore;
830 my $dir = $cfg->{'leistore.dir'} // store_path($self);
831 return unless $creat || -d $dir;
832 PublicInbox::LeiStore->new($dir, { creat => $creat });
837 my ($self, @argv) = @_;
838 my %env = (%{$self->{env}}, GIT_CONFIG => undef);
839 my $cfg = _lei_cfg($self, 1);
840 my $cmd = [ qw(git config -f), $cfg->{'-f'}, @argv ];
841 my %rdr = map { $_ => $self->{$_} } (0..2);
842 waitpid(spawn($cmd, \%env, \%rdr), 0);
846 my ($self, @argv) = @_;
847 $self->{opt}->{'config-file'} and return fail $self,
848 "config file switches not supported by `lei config'";
850 x_it($self, $?) if $?;
853 sub lei_daemon_pid { puts shift, $$ }
855 sub lei_daemon_kill {
857 my $sig = $self->{opt}->{signal} // 'TERM';
858 kill($sig, $$) or fail($self, "kill($sig, $$): $!");
861 # Shell completion helper. Used by lei-completion.bash and hopefully
862 # other shells. Try to do as much here as possible to avoid redundancy
863 # and improve maintainability.
865 my ($self, @argv) = @_; # argv = qw(lei and any other args...)
866 shift @argv; # ignore "lei", the entire command is sent
867 @argv or return puts $self, grep(!/^_/, keys %CMD), qw(--help -h -C);
868 my $cmd = shift @argv;
869 my $info = $CMD{$cmd} // do { # filter matching commands
870 @argv or puts $self, grep(/\A\Q$cmd\E/, keys %CMD);
873 my ($proto, undef, @spec) = @$info;
875 my $re = defined($cur) ? qr/\A\Q$cur\E/ : qr/./;
876 if (substr(my $_cur = $cur // '-', 0, 1) eq '-') { # --switches
877 # gross special case since the only git-config options
878 # Consider moving to a table if we need more special cases
879 # we use Getopt::Long for are the ones we reject, so these
880 # are the ones we don't reject:
881 if ($cmd eq 'config') {
882 puts $self, grep(/$re/, keys %CONFIG_KEYS);
883 @spec = qw(add z|null get get-all unset unset-all
884 replace-all get-urlmatch
885 remove-section rename-section
886 name-only list|l edit|e
887 get-color-name get-colorbool);
890 # generate short/long names from Getopt::Long specs
891 puts $self, grep(/$re/, qw(--help -h -C), map {
892 if (s/[:=].+\z//) { # req/optional args, e.g output|o=i
893 } elsif (s/\+\z//) { # verbose|v+
895 # negation: mail! => no-mail|mail
896 s/([\w\-]+)/$1|no-$1/g
899 my $x = length > 1 ? "--$_" : "-$_";
900 $x eq $_cur ? () : $x;
901 } grep(!/_/, split(/\|/, $_, -1)) # help|h
902 } grep { $OPTDESC{"$_\t$cmd"} || $OPTDESC{$_} } @spec);
903 } elsif ($cmd eq 'config' && !@argv && !$CONFIG_KEYS{$cur}) {
904 puts $self, grep(/$re/, keys %CONFIG_KEYS);
907 # switch args (e.g. lei q -f mbox<TAB>)
908 if (($argv[-1] // $cur // '') =~ /\A--?([\w\-]+)\z/) {
909 my $opt = quotemeta $1;
911 my $v = $OPTDESC{$_};
912 my @v = ref($v) ? split(/\|/, $v->[0]) : ();
913 # get rid of ALL CAPS placeholder (e.g "OUT")
914 # (TODO: completion for external paths)
915 shift(@v) if scalar(@v) && uc($v[0]) eq $v[0];
917 } grep(/\A(?:[\w-]+\|)*$opt\b.*?(?:\t$cmd)?\z/, keys %OPTDESC);
919 if (my $cb = lazy_cb($self, $cmd, '_complete_')) {
920 puts $self, $cb->($self, @argv, $cur ? ($cur) : ());
922 # TODO: URLs, pathnames, OIDs, MIDs, etc... See optparse() for
927 my ($argv, $env) = @_;
928 my $argc = scalar @$argv;
929 my $buf = 'exec '.join("\0", scalar(@$argv), @$argv);
930 while (my ($k, $v) = each %$env) { $buf .= "\0$k=$v" };
936 my $mua = $self->{opt}->{mua} // return;
937 my $mfolder = $self->{ovv}->{dst};
938 my (@cmd, $replaced);
939 if ($mua =~ /\A(?:mutt|mailx|mail|neomutt)\z/) {
941 # TODO: help wanted: other common FOSS MUAs
943 require Text::ParseWords;
944 @cmd = Text::ParseWords::shellwords($mua);
945 # mutt uses '%f' for open-hook with compressed mbox, we follow
946 @cmd = map { $_ eq '%f' ? ($replaced = $mfolder) : $_ } @cmd;
948 push @cmd, $mfolder unless defined($replaced);
949 if ($self->{sock}) { # lei(1) client process runs it
950 # restore terminal: echo $query | lei q --stdin --mua=...
952 $io->[0] = $self->{1} if $self->{opt}->{stdin} && -t $self->{1};
953 send_exec_cmd($self, $io, \@cmd, {});
955 if ($self->{lxs} && $self->{au_done}) { # kick wait_startq
956 syswrite($self->{au_done}, 'q' x ($self->{lxs}->{jobs} // 0));
958 return unless -t $self->{2}; # XXX how to determine non-TUI MUAs?
959 $self->{opt}->{quiet} = 1;
960 delete $self->{-progress};
961 delete $self->{opt}->{verbose};
964 sub send_exec_cmd { # tell script/lei to execute a command
965 my ($self, $io, $cmd, $env) = @_;
966 my $sock = $self->{sock} // die 'lei client gone';
967 my $fds = [ map { fileno($_) } @$io ];
968 $send_cmd->($sock, $fds, exec_buf($cmd, $env), MSG_EOR);
971 sub poke_mua { # forces terminal MUAs to wake up and hopefully notice new mail
973 my $alerts = $self->{opt}->{alert} // return;
974 my $sock = $self->{sock};
975 while (my $op = shift(@$alerts)) {
976 if ($op eq ':WINCH') {
977 # hit the process group that started the MUA
978 send($sock, '-WINCH', MSG_EOR) if $sock;
979 } elsif ($op eq ':bell') {
981 } elsif ($op =~ /(?<!\\),/) { # bare ',' (not ',,')
982 push @$alerts, split(/(?<!\\),/, $op);
983 } elsif ($op =~ m!\A([/a-z0-9A-Z].+)!) {
984 my $cmd = $1; # run an arbitrary command
985 require Text::ParseWords;
986 $cmd = [ Text::ParseWords::shellwords($cmd) ];
987 send($sock, exec_buf($cmd, {}), MSG_EOR) if $sock;
989 err($self, "W: unsupported --alert=$op"); # non-fatal
994 my %path_to_fd = ('/dev/stdin' => 0, '/dev/stdout' => 1, '/dev/stderr' => 2);
995 $path_to_fd{"/dev/fd/$_"} = $_ for (0..2);
997 # this also normalizes the path
999 my ($self, $path) = @_;
1000 $path = rel2abs($self, $path);
1002 $path_to_fd{$path} // (
1003 ($path =~ m!\A/(?:dev|proc/self)/fd/[0-9]+\z!) ?
1004 fail($self, "cannot open $path from daemon") : -1
1008 # caller needs to "-t $self->{1}" to check if tty
1011 my $fh = popen_rd([qw(git var GIT_PAGER)]);
1012 chomp(my $pager = <$fh> // '');
1013 close($fh) or warn "`git var PAGER' error: \$?=$?";
1014 return if $pager eq 'cat' || $pager eq '';
1015 my $new_env = { LESS => 'FRX', LV => '-c' };
1016 $new_env->{MORE} = 'FRX' if $^O eq 'freebsd';
1017 pipe(my ($r, $wpager)) or return warn "pipe: $!";
1018 my $rdr = { 0 => $r, 1 => $self->{1}, 2 => $self->{2} };
1019 my $pgr = [ undef, @$rdr{1, 2} ];
1020 my $env = $self->{env};
1021 if ($self->{sock}) { # lei(1) process runs it
1022 delete @$new_env{keys %$env}; # only set iff unset
1023 send_exec_cmd($self, [ @$rdr{0..2} ], [$pager], $new_env);
1025 die 'BUG: start_pager w/o socket';
1027 $self->{1} = $wpager;
1028 $self->{2} = $wpager if -t $self->{2};
1029 $env->{GIT_PAGER_IN_USE} = 'true'; # we may spawn git
1030 $self->{pgr} = $pgr;
1035 my $pgr = delete($self->{pgr}) or return;
1036 $self->{2} = $pgr->[2];
1037 # do not restore original stdout, just close it so we error out
1038 close(delete($self->{1})) if $self->{1};
1041 sub accept_dispatch { # Listener {post_accept} callback
1042 my ($sock) = @_; # ignore other
1043 $sock->autoflush(1);
1044 my $self = bless { sock => $sock }, __PACKAGE__;
1045 vec(my $rvec = '', fileno($sock), 1) = 1;
1046 select($rvec, undef, undef, 60) or
1047 return send($sock, 'timed out waiting to recv FDs', MSG_EOR);
1048 # (4096 * 33) >MAX_ARG_STRLEN
1049 my @fds = $recv_cmd->($sock, my $buf, 4096 * 33) or return; # EOF
1050 if (!defined($fds[0])) {
1051 warn(my $msg = "recv_cmd failed: $!");
1052 return send($sock, $msg, MSG_EOR);
1056 open($self->{$i++}, '+<&=', $fd) and next;
1057 send($sock, "open(+<&=$fd) (FD=$i): $!", MSG_EOR);
1059 $i == 4 or return send($sock, 'not enough FDs='.($i-1), MSG_EOR)
1061 # $ENV_STR = join('', map { "\0$_=$ENV{$_}" } keys %ENV);
1062 # $buf = "$argc\0".join("\0", @ARGV).$ENV_STR."\0\0";
1063 substr($buf, -2, 2, '') eq "\0\0" or # s/\0\0\z//
1064 return send($sock, 'request command truncated', MSG_EOR);
1065 my ($argc, @argv) = split(/\0/, $buf, -1);
1067 my %env = map { split(/=/, $_, 2) } splice(@argv, $argc);
1068 if (chdir($self->{3})) {
1070 $self->{env} = \%env;
1071 eval { dispatch($self, @argv) };
1072 send($sock, $@, MSG_EOR) if $@;
1074 send($sock, "fchdir: $!", MSG_EOR); # implicit close
1080 delete $self->{-progress};
1081 _drop_wq($self) if $self->{failed};
1082 close(delete $self->{1}) if $self->{1}; # may reap_compress
1083 $self->close if $self->{-event_init_done}; # PublicInbox::DS::close
1086 # for long-running results
1089 local %ENV = %{$self->{env}};
1090 my $sock = $self->{sock};
1091 local $current_lei = $self;
1093 while (my @fds = $recv_cmd->($sock, my $buf, 4096)) {
1094 if (scalar(@fds) == 1 && !defined($fds[0])) {
1095 return if $! == EAGAIN;
1096 next if $! == EINTR;
1097 last if $! == ECONNRESET;
1101 open my $rfh, '+<&=', $fd;
1103 die "unrecognized client signal: $buf";
1105 _drop_wq($self); # EOF, client disconnected
1109 eval { $self->fail($err) };
1114 sub event_step_init {
1116 my $sock = $self->{sock} or return;
1117 $self->{-event_init_done} //= do { # persist til $ops done
1118 $self->SUPER::new($sock, EPOLLIN|EPOLLET);
1125 sub oldset { $oldset }
1127 sub dump_and_clear_log {
1128 if (defined($errors_log) && -s STDIN && seek(STDIN, 0, SEEK_SET)) {
1130 unshift(@pfx, "$errors_log ") if @pfx;
1131 warn @pfx, do { local $/; <STDIN> };
1132 truncate(STDIN, 0) or warn "ftruncate ($errors_log): $!";
1138 my $lei = bless { env => { %{$cfg->{-env}} } }, __PACKAGE__;
1139 open($lei->{0}, '<&', \*STDIN) or die "dup 0: $!";
1140 open($lei->{1}, '>>&', \*STDOUT) or die "dup 1: $!";
1141 open($lei->{2}, '>>&', \*STDERR) or die "dup 2: $!";
1142 open($lei->{3}, '/') or die "open /: $!";
1143 chdir($lei->{3}) or die "chdir /': $!";
1145 socketpair($x, $y, AF_UNIX, SOCK_SEQPACKET, 0) or die "socketpair: $!";
1147 require PublicInbox::LeiSelfSocket;
1148 PublicInbox::LeiSelfSocket->new($y); # adds to event loop
1152 sub dir_idle_handler ($) { # PublicInbox::DirIdle callback
1153 my ($ev) = @_; # Linux::Inotify2::Event or duck type
1154 my $fn = $ev->fullname;
1155 if ($fn =~ m!\A(.+)/(new|cur)/([^/]+)\z!) { # Maildir file
1156 my ($mdir, $nc, $bn) = ($1, $2, $3);
1157 $nc = '' if $ev->IN_DELETE;
1158 for my $f (keys %{$MDIR2CFGPATH->{$mdir} // {}}) {
1159 my $cfg = $PATH2CFG{$f} // next;
1161 local %ENV = %{$cfg->{-env}};
1162 my $lei = cfg2lei($cfg);
1163 $lei->dispatch('note-event',
1164 "maildir:$mdir", $nc, $bn, $fn);
1166 warn "E note-event $f: $@\n" if $@;
1169 if ($ev->can('cancel') && ($ev->IN_IGNORE || $ev->IN_UNMOUNT)) {
1172 if ($fn =~ m!\A(.+)/(?:new|cur)\z! && !-e $fn) {
1173 delete $MDIR2CFGPATH->{$1};
1175 if (!-e $fn) { # config file or Maildir gone
1176 for my $cfgpaths (values %$MDIR2CFGPATH) {
1177 delete $cfgpaths->{$fn};
1179 delete $PATH2CFG{$fn};
1183 # lei(1) calls this when it can't connect
1185 my ($path, $errno, $narg) = @_;
1186 local ($errors_log, $listener);
1187 my ($sock_dir) = ($path =~ m!\A(.+?)/[^/]+\z!);
1188 $errors_log = "$sock_dir/errors.log";
1189 my $addr = pack_sockaddr_un($path);
1190 my $lk = bless { lock_path => $errors_log }, 'PublicInbox::Lock';
1192 socket($listener, AF_UNIX, SOCK_SEQPACKET, 0) or die "socket: $!";
1193 if ($errno == ECONNREFUSED || $errno == ENOENT) {
1194 return if connect($listener, $addr); # another process won
1195 if ($errno == ECONNREFUSED && -S $path) {
1196 unlink($path) or die "unlink($path): $!";
1199 $! = $errno; # allow interpolation to stringify in die
1200 die "connect($path): $!";
1202 umask(077) // die("umask(077): $!");
1203 bind($listener, $addr) or die "bind($path): $!";
1204 listen($listener, 1024) or die "listen: $!";
1207 my @st = stat($path) or die "stat($path): $!";
1208 my $dev_ino_expect = pack('dd', $st[0], $st[1]); # dev+ino
1209 local $oldset = PublicInbox::DS::block_signals();
1211 $send_cmd = PublicInbox::Spawn->can('send_cmd4');
1212 $recv_cmd = PublicInbox::Spawn->can('recv_cmd4') // do {
1213 require PublicInbox::CmdIPC4;
1214 $send_cmd = PublicInbox::CmdIPC4->can('send_cmd4');
1215 PublicInbox::CmdIPC4->can('recv_cmd4');
1218 $recv_cmd or die <<"";
1219 (Socket::MsgHdr || Inline::C) missing/unconfigured (narg=$narg);
1221 require PublicInbox::Listener;
1222 require PublicInbox::PktOp;
1223 (-p STDOUT) or die "E: stdout must be a pipe\n";
1224 open(STDIN, '+>>', $errors_log) or die "open($errors_log): $!";
1225 STDIN->autoflush(1);
1226 dump_and_clear_log("from previous daemon process:\n");
1227 POSIX::setsid() > 0 or die "setsid: $!";
1228 my $pid = fork // die "fork: $!";
1230 $0 = "lei-daemon $path";
1232 local $MDIR2CFGPATH;
1233 $listener->blocking(0);
1235 my $pil = PublicInbox::Listener->new($listener, \&accept_dispatch);
1237 my (undef, $eof_p) = PublicInbox::PktOp->pair;
1239 $exit_code //= shift;
1240 my $lis = $pil or exit($exit_code);
1241 # closing eof_p triggers \&noop wakeup
1242 $listener = $eof_p = $pil = $path = undef;
1243 $lis->close; # DS::close
1244 PublicInbox::DS->SetLoopTimeout(1000);
1248 CHLD => \&PublicInbox::DS::enqueue_reap,
1256 my $sigfd = PublicInbox::Sigfd->new($sig, SFD_NONBLOCK);
1257 local @SIG{keys %$sig} = values(%$sig) unless $sigfd;
1259 local $SIG{PIPE} = 'IGNORE';
1260 require PublicInbox::DirIdle;
1261 local $dir_idle = PublicInbox::DirIdle->new([$sock_dir], sub {
1262 # just rely on wakeup to hit PostLoopCallback set below
1263 dir_idle_handler($_[0]) if $_[0]->fullname ne $path;
1266 undef $sigfd; # unref, already in DS::DescriptorMap
1268 # wake up every second to accept signals if we don't
1269 # have signalfd or IO::KQueue:
1270 PublicInbox::DS::sig_setmask($oldset);
1271 PublicInbox::DS->SetLoopTimeout(1000);
1273 PublicInbox::DS->SetPostLoopCallback(sub {
1274 my ($dmap, undef) = @_;
1275 if (@st = defined($path) ? stat($path) : ()) {
1276 if ($dev_ino_expect ne pack('dd', $st[0], $st[1])) {
1277 warn "$path dev/ino changed, quitting\n";
1280 } elsif (defined($path)) { # ENOENT is common
1281 warn "stat($path): $!, quitting ...\n" if $! != ENOENT;
1285 return 1 if defined($path);
1288 for my $s (values %$dmap) {
1289 $s->can('busy') or next;
1290 if ($s->busy($now)) {
1296 $n; # true: continue, false: stop
1299 # STDIN was redirected to /dev/null above, closing STDERR and
1300 # STDOUT will cause the calling `lei' client process to finish
1301 # reading the <$daemon> pipe.
1302 local $SIG{__WARN__} = sub {
1303 $current_lei ? err($current_lei, @_) : warn(
1304 strftime('%Y-%m-%dT%H:%M:%SZ', gmtime(time))," $$ ", @_);
1306 open STDERR, '>&STDIN' or die "redirect stderr failed: $!";
1307 open STDOUT, '>&STDIN' or die "redirect stdout failed: $!";
1308 # $daemon pipe to `lei' closed, main loop begins:
1309 PublicInbox::DS->EventLoop;
1310 exit($exit_code // 0);
1313 sub busy { 1 } # prevent daemon-shutdown if client is connected
1315 # ensures stdout hits the FS before sock disconnects so a client
1316 # can immediately reread it
1319 if (my $counters = delete $self->{counters}) {
1320 for my $k (sort keys %$counters) {
1321 my $nr = $counters->{$k};
1322 $self->child_error(1 << 8, "$nr $k messages");
1325 $self->{1}->autoflush(1) if $self->{1};
1327 # preserve $? for ->fail or ->x_it code
1330 sub wq_done_wait { # dwaitpid callback
1331 my ($arg, $pid) = @_;
1332 my ($wq, $lei) = @$arg;
1333 my $err_type = $lei->{-err_type};
1334 $? and $lei->child_error($?,
1335 $err_type ? "$err_type errors during $lei->{cmd}" : ());
1341 my $dh = $lei->{3} // die 'BUG: lei->{3} (CWD) gone';
1342 chdir($dh) || $lei->fail("fchdir: $!");
1345 sub wq_eof { # EOF callback for main daemon
1347 my $wq1 = delete $lei->{wq1} // return $lei->fail; # already failed
1348 $wq1->wq_wait_old(\&wq_done_wait, $lei);
1351 sub watch_state_ok ($) {
1352 my ($state) = $_[-1]; # $_[0] may be $self
1353 $state =~ /\Apause|(?:import|index|tag)-(?:ro|rw)\z/;
1356 sub refresh_watches {
1358 my $cfg = _lei_cfg($lei) or return;
1359 $cfg->{-env} //= { %{$lei->{env}}, PWD => '/' }; # for cfg2lei
1360 my $watches = $cfg->{-watches} //= {};
1361 require PublicInbox::LeiWatch;
1362 for my $w (grep(/\Awatch\..+\.state\z/, keys %$cfg)) {
1363 my $url = substr($w, length('watch.'), -length('.state'));
1364 my $lw = $watches->{$w} //= PublicInbox::LeiWatch->new($url);
1365 my $state = $cfg->get_1("watch.$url", 'state');
1366 if (!watch_state_ok($state)) {
1367 $lei->err("watch.$url.state=$state not supported");
1370 my $f = $cfg->{'-f'};
1371 if ($url =~ /\Amaildir:(.+)/i) {
1372 my $d = File::Spec->canonpath($1);
1373 if ($state eq 'pause') {
1374 delete $MDIR2CFGPATH->{$d}->{$f};
1375 scalar(keys %{$MDIR2CFGPATH->{$d}}) or
1376 delete $MDIR2CFGPATH->{$d};
1377 } elsif (!exists($MDIR2CFGPATH->{$d}->{$f})) {
1378 $dir_idle->add_watches(["$d/cur", "$d/new"], 1);
1379 $MDIR2CFGPATH->{$d}->{$f} = undef;
1381 } else { # TODO: imap/nntp/jmap
1382 $lei->child_error(1,
1383 "E: watch $url not supported, yet");