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(EAGAIN EINTR ECONNREFUSED ENOENT ECONNRESET);
18 use Fcntl qw(SEEK_SET);
19 use Sys::Syslog qw(syslog openlog);
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 run_die popen_rd);
25 use PublicInbox::OnDestroy;
26 use Text::Wrap qw(wrap);
27 use File::Path qw(mkpath);
29 our $quit = \&CORE::exit;
30 our ($current_lei, $errors_log);
31 my ($recv_cmd, $send_cmd);
32 my $GLP = Getopt::Long::Parser->new;
33 $GLP->configure(qw(gnu_getopt no_ignore_case auto_abbrev));
34 my $GLP_PASS = Getopt::Long::Parser->new;
35 $GLP_PASS->configure(qw(gnu_getopt no_ignore_case auto_abbrev pass_through));
37 our %PATH2CFG; # persistent for socket daemon
38 our @TO_CLOSE_ATFORK_CHILD;
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, $GLP_PASS) # for Getopt::Long
70 File::Spec->rel2abs(($env->{XDG_DATA_HOME} //
71 ($env->{HOME} // '/nonexistent').'/.local/share')
72 .'/lei/store', $env->{PWD});
75 sub _config_path ($) {
77 File::Spec->rel2abs(($env->{XDG_CONFIG_HOME} //
78 ($env->{HOME} // '/nonexistent').'/.config')
79 .'/lei/config', $env->{PWD});
82 # TODO: generate shell completion + help using %CMD and %OPTDESC
83 # command => [ positional_args, 1-line description, Getopt::Long option spec ]
84 our %CMD = ( # sorted in order of importance/use:
85 'q' => [ 'SEARCH_TERMS...', 'search for messages matching terms', qw(
86 save-as=s output|mfolder|o=s format|f=s dedupe|d=s thread|t augment|a
87 sort|s=s reverse|r offset=i remote local! external! pretty mua-cmd=s
88 since|after=s until|before=s), opt_dash('limit|n=i', '[0-9]+') ],
90 'show' => [ 'MID|OID', 'show a given object (Message-ID or object ID)',
91 qw(type=s solve! format|f=s dedupe|d=s thread|t remote local!),
92 pass_through('git show') ],
94 'add-external' => [ 'URL_OR_PATHNAME',
95 'add/set priority of a publicinbox|extindex for extra matches',
96 qw(boost=i quiet|q) ],
97 'ls-external' => [ '[FILTER...]', 'list publicinbox|extindex locations',
98 qw(format|f=s z|0 local remote quiet|q) ],
99 'forget-external' => [ '{URL_OR_PATHNAME|--prune}',
100 'exclude further results from a publicinbox|extindex',
103 'ls-query' => [ '[FILTER...]', 'list saved search queries',
104 qw(name-only format|f=s z) ],
105 'rm-query' => [ 'QUERY_NAME', 'remove a saved search' ],
106 'mv-query' => [ qw(OLD_NAME NEW_NAME), 'rename a saved search' ],
108 'plonk' => [ '--thread|--from=IDENT',
109 'exclude mail matching From: or thread from non-Message-ID searches',
110 qw(stdin| thread|t from|f=s mid=s oid=s) ],
111 'mark' => [ 'MESSAGE_FLAGS...',
112 'set/unset flags on message(s) from stdin',
113 qw(stdin| oid=s exact by-mid|mid:s) ],
114 'forget' => [ '[--stdin|--oid=OID|--by-mid=MID]',
115 "exclude message(s) on stdin from `q' search results",
116 qw(stdin| oid=s exact by-mid|mid:s quiet|q) ],
118 'purge-mailsource' => [ '{URL_OR_PATHNAME|--all}',
119 'remove imported messages from IMAP, Maildirs, and MH',
120 qw(exact! all jobs:i indexed) ],
122 # code repos are used for `show' to solve blobs from patch mails
123 'add-coderepo' => [ 'PATHNAME', 'add or set priority of a git code repo',
125 'ls-coderepo' => [ '[FILTER_TERMS...]',
126 'list known code repos', qw(format|f=s z) ],
127 'forget-coderepo' => [ 'PATHNAME',
128 'stop using repo to solve blobs from patches',
131 'add-watch' => [ '[URL_OR_PATHNAME]',
132 'watch for new messages and flag changes',
133 qw(import! flags! interval=s recursive|r exclude=s include=s) ],
134 'ls-watch' => [ '[FILTER...]', 'list active watches with numbers and status',
136 'pause-watch' => [ '[WATCH_NUMBER_OR_FILTER]', qw(all local remote) ],
137 'resume-watch' => [ '[WATCH_NUMBER_OR_FILTER]', qw(all local remote) ],
138 'forget-watch' => [ '{WATCH_NUMBER|--prune}', 'stop and forget a watch',
141 'import' => [ '{URL_OR_PATHNAME|--stdin}',
142 'one-shot import/update from URL or filesystem',
143 qw(stdin| offset=i recursive|r exclude=s include=s !flags),
146 'config' => [ '[...]', sub {
147 'git-config(1) wrapper for '._config_path($_[0]);
148 }, qw(config-file|system|global|file|f=s), # for conflict detection
149 pass_through('git config') ],
150 'init' => [ '[PATHNAME]', sub {
151 'initialize storage, default: '._store_path($_[0]);
153 'daemon-kill' => [ '[-SIGNAL]', 'signal the lei-daemon',
154 opt_dash('signal|s=s', '[0-9]+|(?:[A-Z][A-Z0-9]+)') ],
155 'daemon-pid' => [ '', 'show the PID of the lei-daemon' ],
156 'help' => [ '[SUBCOMMAND]', 'show help' ],
158 # XXX do we need this?
159 # 'git' => [ '[ANYTHING...]', 'git(1) wrapper', pass_through('git') ],
161 'reorder-local-store-and-break-history' => [ '[REFNAME]',
162 'rewrite git history in an attempt to improve compression',
165 # internal commands are prefixed with '_'
166 '_complete' => [ '[...]', 'internal shell completion helper',
167 pass_through('everything') ],
170 # switch descriptions, try to keep consistent across commands
171 # $spec: Getopt::Long option specification
172 # $spec => [@ALLOWED_VALUES (default is first), $description],
173 # $spec => $description
174 # "$SUB_COMMAND TAB $spec" => as above
175 my $stdin_formats = [ 'IN|auto|raw|mboxrd|mboxcl2|mboxcl|mboxo',
176 'specify message input format' ];
177 my $ls_format = [ 'OUT|plain|json|null', 'listing output format' ];
180 'help|h' => 'show this built-in help',
181 'quiet|q' => 'be quiet',
182 'solve!' => 'do not attempt to reconstruct blobs from emails',
183 'save-as=s' => ['NAME', 'save a search terms by given name'],
185 'type=s' => [ 'any|mid|git', 'disambiguate type' ],
187 'dedupe|d=s' => ['STRAT|content|oid|mid|none',
188 'deduplication strategy'],
189 'show thread|t' => 'display entire thread a message belongs to',
191 'return all messages in the same thread as the actual match(es)',
192 'augment|a' => 'augment --output destination instead of clobbering',
194 'output|o=s' => [ 'DEST',
195 "destination (e.g. `/path/to/Maildir', or `-' for stdout)" ],
196 'mua-cmd|mua=s' => [ 'COMMAND',
197 "MUA to run on --output Maildir or mbox (e.g. `mutt -f %f'" ],
199 'show format|f=s' => [ 'OUT|plain|raw|html|mboxrd|mboxcl2|mboxcl',
200 'message/object output format' ],
201 'mark format|f=s' => $stdin_formats,
202 'forget format|f=s' => $stdin_formats,
203 'q format|f=s' => [ 'OUT|maildir|mboxrd|mboxcl2|mboxcl|html|oid|json',
204 'specify output format, default depends on --output'],
205 'ls-query format|f=s' => $ls_format,
206 'ls-external format|f=s' => $ls_format,
208 'limit|n=i@' => ['NUM', 'limit on number of matches (default: 10000)' ],
209 'offset=i' => ['OFF', 'search result offset (default: 0)'],
211 'sort|s=s' => [ 'VAL|received,relevance,docid',
212 "order of results `--output'-dependent"],
213 'reverse|r' => [ 'reverse search results' ], # like sort(1)
215 'boost=i' => 'increase/decrease priority of results (default: 0)',
217 'local' => 'limit operations to the local filesystem',
218 'local!' => 'exclude results from the local filesystem',
219 'remote' => 'limit operations to those requiring network access',
220 'remote!' => 'prevent operations requiring network access',
222 'mid=s' => 'specify the Message-ID of a message',
223 'oid=s' => 'specify the git object ID of a message',
225 'recursive|r' => 'scan directories/mailboxes/newsgroups recursively',
226 'exclude=s' => 'exclude mailboxes/newsgroups based on pattern',
227 'include=s' => 'include mailboxes/newsgroups based on pattern',
229 'exact' => 'operate on exact header matches only',
230 'exact!' => 'rely on content match instead of exact header matches',
232 'by-mid|mid:s' => [ 'MID', 'match only by Message-ID, ignoring contents' ],
233 'jobs:i' => 'set parallelism level',
235 # xargs, env, use "-0", git(1) uses "-z". We support z|0 everywhere
236 'z|0' => 'use NUL \\0 instead of newline (CR) to delimit lines',
238 'signal|s=s' => [ 'SIG', 'signal to send lei-daemon (default: TERM)' ],
242 'leistore.dir' => 'top-level storage location',
245 # pronounced "exit": x_it(1 << 8) => exit(1); x_it(13) => SIGPIPE
247 my ($self, $code) = @_;
248 # make sure client sees stdout before exit
249 $self->{1}->autoflush(1) if $self->{1};
250 dump_and_clear_log();
251 if (my $sock = $self->{sock}) {
252 send($sock, "x_it $code", MSG_EOR);
253 } elsif (!($code & 127)) { # oneshot, ignore signals
254 # don't want to end up using $? from child processes
255 for my $f (qw(lxs l2m)) {
256 my $wq = delete $self->{$f} or next;
263 sub puts ($;@) { print { shift->{1} } map { "$_\n" } @_ }
265 sub out ($;@) { print { shift->{1} } @_ }
269 my $err = $self->{2} // ($self->{pgr} // [])->[2] // *STDERR{IO};
270 print $err @_, (substr($_[-1], -1, 1) eq "\n" ? () : "\n");
273 sub qerr ($;@) { $_[0]->{opt}->{quiet} or err(shift, @_) }
276 my ($self, $buf, $exit_code) = @_;
278 x_it($self, ($exit_code // 1) << 8);
282 sub atfork_prepare_wq {
283 my ($self, $wq) = @_;
284 my $tcafc = $wq->{-ipc_atfork_child_close};
285 push @$tcafc, @TO_CLOSE_ATFORK_CHILD;
286 if (my $sock = $self->{sock}) {
287 push @$tcafc, @$self{qw(0 1 2)}, $sock;
289 for my $f (qw(lxs l2m)) {
290 my $ipc = $self->{$f} or next;
291 push @$tcafc, grep { defined }
292 @$ipc{qw(-wq_s1 -wq_s2 -ipc_req -ipc_res)};
296 # usage: my %sig = $lei->atfork_child_wq($wq);
297 # local @SIG{keys %sig} = values %sig;
298 sub atfork_child_wq {
299 my ($self, $wq) = @_;
300 my ($sock, $l2m_wq_s1);
301 (@$self{qw(0 1 2)}, $sock, $l2m_wq_s1) = delete(@$wq{0..4});
302 $self->{sock} = $sock if -S $sock;
303 $self->{l2m}->{-wq_s1} = $l2m_wq_s1 if $l2m_wq_s1 && -S $l2m_wq_s1;
306 $quit = \&CORE::exit;
307 @TO_CLOSE_ATFORK_CHILD = ();
308 (__WARN__ => sub { err($self, @_) },
310 $self->x_it(13); # SIGPIPE = 13
311 # we need to close explicitly to avoid Perl warning on SIGPIPE
313 next unless $self->{$i} && (-p $self->{$i} || -S _);
314 close(delete $self->{$i});
316 # trigger the LeiXSearch $done OpPipe:
317 syswrite($self->{0}, '!') if $self->{0} && -p $self->{0};
318 $SIG{PIPE} = 'DEFAULT';
319 die bless(\"$_[0]", 'PublicInbox::SIGPIPE'),
323 # usage: ($lei, @io) = $lei->atfork_parent_wq($wq);
324 sub atfork_parent_wq {
325 my ($self, $wq) = @_;
326 my $env = delete $self->{env}; # env is inherited at fork
327 my $ret = bless { %$self }, ref($self);
328 if (my $dedupe = delete $ret->{dedupe}) {
329 $ret->{dedupe} = $wq->deep_clone($dedupe);
332 delete @$ret{qw(-lei_store cfg pgr lxs)}; # keep l2m
333 my @io = delete @$ret{0..2};
334 $io[3] = delete($ret->{sock}) // *STDERR{GLOB};
335 my $l2m = $ret->{l2m};
336 if ($l2m && $l2m != $wq) { # $wq == lxs
337 $io[4] = $l2m->{-wq_s1} if $l2m->{-wq_s1};
338 if (my @pids = $l2m->wq_close) {
339 $wq->{l2m_pids} = \@pids;
346 my ($self, $errmsg) = @_;
347 my $cmd = $self->{cmd} // 'COMMAND';
348 my @info = @{$CMD{$cmd} // [ '...', '...' ]};
349 my @top = ($cmd, shift(@info) // ());
350 my $cmd_desc = shift(@info);
351 $cmd_desc = $cmd_desc->($self->{env}) if ref($cmd_desc) eq 'CODE';
354 for my $sw (grep { !ref } @info) { # ("prio=s", "z", $GLP_PASS)
355 my $desc = $OPTDESC{"$cmd\t$sw"} // $OPTDESC{$sw} // next;
357 ($arg_vals, $desc) = @$desc if ref($desc) eq 'ARRAY';
359 # lower-case is a keyword (e.g. `content', `oid'),
360 # ALL_CAPS is a string description (e.g. `PATH')
361 if ($desc !~ /default/ && $arg_vals =~ /\b([a-z]+)[,\|]/) {
362 $desc .= "\ndefault: `$1'";
366 if ($x =~ s/!\z//) { # solve! => --no-solve
368 } elsif ($x =~ s/:.+//) { # optional args: $x = "mid:s"
369 @vals = (' [', undef, ']');
370 } elsif ($x =~ s/=.+//) { # required arg: $x = "type=s"
371 @vals = (' ', undef);
372 } # else: no args $x = 'thread|t'
373 for (split(/\|/, $x)) { # help|h
374 length($_) > 1 ? push(@l, "--$_") : push(@s, "-$_");
376 if (!scalar(@vals)) { # no args 'thread|t'
377 } elsif ($arg_vals =~ s/\A([A-Z_]+)\b//) { # "NAME"
380 $vals[1] = uc(substr($l[0], 2)); # "--type" => "TYPE"
382 if ($arg_vals =~ /([,\|])/) {
384 my @allow = split(/\Q$sep\E/, $arg_vals);
385 my $must = $sep eq '|' ? 'Must' : 'Can';
386 @allow = map { "`$_'" } @allow;
387 my $last = pop @allow;
388 $desc .= "\n$must be one of: " .
389 join(', ', @allow) . " or $last";
391 my $lhs = join(', ', @s, @l) . join('', @vals);
392 if ($x =~ /\|\z/) { # "stdin|" or "clear|"
393 $lhs =~ s/\A--/- , --/;
395 $lhs =~ s/\A--/ --/; # pad if no short options
397 $lpad = length($lhs) if length($lhs) > $lpad;
398 push @opt_desc, $lhs, $desc;
400 my $msg = $errmsg ? "E: $errmsg\n" : '';
407 local $Text::Wrap::columns = 78 - $lpad;
408 my $padding = ' ' x ($lpad + 2);
409 while (my ($lhs, $rhs) = splice(@opt_desc, 0, 2)) {
410 $msg .= ' '.pack("A$lpad", $lhs);
411 $rhs = wrap('', '', $rhs);
412 $rhs =~ s/\n/\n$padding/sg; # LHS pad continuation lines
416 print { $self->{$errmsg ? 2 : 1} } $msg;
417 x_it($self, $errmsg ? 1 << 8 : 0); # stderr => failure
422 my ($self, $cmd, $argv) = @_;
424 $OPT = $self->{opt} = {};
425 my $info = $CMD{$cmd} // [ '[...]' ];
426 my ($proto, undef, @spec) = @$info;
427 my $glp = ref($spec[-1]) eq ref($GLP) ? pop(@spec) : $GLP;
428 push @spec, qw(help|h);
430 if ($spec[0] =~ s/\|\z//s) { # "stdin|" or "clear|" allows "-" alias
431 $lone_dash = $spec[0];
432 $OPT->{$spec[0]} = \(my $var);
433 push @spec, '' => \$var;
435 $glp->getoptionsfromarray($argv, $OPT, @spec) or
436 return _help($self, "bad arguments or options for $cmd");
437 return _help($self) if $OPT->{help};
439 push @$argv, @{$OPT->{-argv}} if defined($OPT->{-argv});
441 # "-" aliases "stdin" or "clear"
442 $OPT->{$lone_dash} = ${$OPT->{$lone_dash}} if defined $lone_dash;
445 my $POS_ARG = '[A-Z][A-Z0-9_]+';
447 my @args = split(/ /, $proto);
448 for my $var (@args) {
449 if ($var =~ /\A$POS_ARG\.\.\.\z/o) { # >= 1 args;
450 $inf = defined($argv->[$i]) and last;
451 $var =~ s/\.\.\.\z//;
452 $err = "$var not supplied";
453 } elsif ($var =~ /\A$POS_ARG\z/o) { # required arg at $i
454 $argv->[$i++] // ($err = "$var not supplied");
455 } elsif ($var =~ /\.\.\.\]\z/) { # optional args start
458 } elsif ($var =~ /\A\[-?$POS_ARG\]\z/) { # one optional arg
460 } elsif ($var =~ /\A.+?\|/) { # required FOO|--stdin
461 my @or = split(/\|/, $var);
464 if ($o =~ /\A--([a-z0-9\-]+)/) {
465 $ok = defined($OPT->{$1});
467 } elsif (defined($argv->[$i])) {
471 } # else continue looping
474 $err = join(', ', @or) . " or $last must be set";
476 warn "BUG: can't parse `$var' in $proto";
480 if (!$inf && scalar(@$argv) > scalar(@args)) {
481 $err //= 'too many arguments';
483 $err ? fail($self, "usage: lei $cmd $proto\nE: $err") : 1;
487 my ($self, $cmd, @argv) = @_;
488 local $current_lei = $self; # for __WARN__
489 dump_and_clear_log("from previous run\n");
490 return _help($self, 'no command given') unless defined($cmd);
491 my $func = "lei_$cmd";
493 if (my $cb = __PACKAGE__->can($func)) {
494 optparse($self, $cmd, \@argv) or return;
496 } elsif (grep(/\A-/, $cmd, @argv)) { # --help or -h only
498 $GLP->getoptionsfromarray([$cmd, @argv], $opt, qw(help|h)) or
499 return _help($self, 'bad arguments or options');
502 fail($self, "`$cmd' is not an lei command");
507 my ($self, $creat) = @_;
508 my $f = _config_path($self->{env});
510 my $cur_st = @st ? pack('dd', $st[10], $st[7]) : ''; # 10:ctime, 7:size
511 if (my $cfg = $PATH2CFG{$f}) { # reuse existing object in common case
512 return ($self->{cfg} = $cfg) if $cur_st eq $cfg->{-st};
519 my (undef, $cfg_dir, undef) = File::Spec->splitpath($f);
520 -d $cfg_dir or mkpath($cfg_dir) or die "mkpath($cfg_dir): $!\n";
521 open my $fh, '>>', $f or die "open($f): $!\n";
522 @st = stat($fh) or die "fstat($f): $!\n";
523 $cur_st = pack('dd', $st[10], $st[7]);
524 qerr($self, "I: $f created") if $self->{cmd} ne 'config';
526 my $cfg = PublicInbox::Config::git_config_dump($f);
527 $cfg->{-st} = $cur_st;
529 $self->{cfg} = $PATH2CFG{$f} = $cfg;
532 sub _lei_store ($;$) {
533 my ($self, $creat) = @_;
534 my $cfg = _lei_cfg($self, $creat);
535 $cfg->{-lei_store} //= do {
536 require PublicInbox::LeiStore;
537 my $dir = $cfg->{'leistore.dir'};
538 $dir //= _store_path($self->{env}) if $creat;
540 PublicInbox::LeiStore->new($dir, { creat => $creat });
545 my ($self, @argv) = @_;
549 my ($self, @argv) = @_;
553 my ($self, @argv) = @_;
554 $self->{opt}->{'config-file'} and return fail $self,
555 "config file switches not supported by `lei config'";
556 my $env = $self->{env};
557 delete local $env->{GIT_CONFIG};
558 my $cfg = _lei_cfg($self, 1);
559 my $cmd = [ qw(git config -f), $cfg->{'-f'}, @argv ];
560 my %rdr = map { $_ => $self->{$_} } (0..2);
561 run_die($cmd, $env, \%rdr);
565 my ($self, $dir) = @_;
566 my $cfg = _lei_cfg($self, 1);
567 my $cur = $cfg->{'leistore.dir'};
568 my $env = $self->{env};
569 $dir //= _store_path($env);
570 $dir = File::Spec->rel2abs($dir, $env->{PWD}); # PWD is symlink-aware
571 my @cur = stat($cur) if defined($cur);
572 $cur = File::Spec->canonpath($cur // $dir);
573 my @dir = stat($dir);
574 my $exists = "I: leistore.dir=$cur already initialized" if @dir;
577 _lei_store($self, 1)->done;
578 return qerr($self, $exists);
581 # some folks like symlinks and bind mounts :P
582 if (@dir && "$cur[0] $cur[1]" eq "$dir[0] $dir[1]") {
583 lei_config($self, 'leistore.dir', $dir);
584 _lei_store($self, 1)->done;
585 return qerr($self, "$exists (as $cur)");
587 return fail($self, <<"");
588 E: leistore.dir=$cur already initialized and it is not $dir
591 lei_config($self, 'leistore.dir', $dir);
592 _lei_store($self, 1)->done;
593 $exists //= "I: leistore.dir=$dir newly initialized";
594 return qerr($self, $exists);
597 sub lei_daemon_pid { puts shift, $$ }
599 sub lei_daemon_kill {
601 my $sig = $self->{opt}->{signal} // 'TERM';
602 kill($sig, $$) or fail($self, "kill($sig, $$): $!");
605 sub lei_help { _help($_[0]) }
607 # Shell completion helper. Used by lei-completion.bash and hopefully
608 # other shells. Try to do as much here as possible to avoid redundancy
609 # and improve maintainability.
611 my ($self, @argv) = @_; # argv = qw(lei and any other args...)
612 shift @argv; # ignore "lei", the entire command is sent
613 @argv or return puts $self, grep(!/^_/, keys %CMD), qw(--help -h);
614 my $cmd = shift @argv;
615 my $info = $CMD{$cmd} // do { # filter matching commands
616 @argv or puts $self, grep(/\A\Q$cmd\E/, keys %CMD);
619 my ($proto, undef, @spec) = @$info;
621 my $re = defined($cur) ? qr/\A\Q$cur\E/ : qr/./;
622 if (substr($cur // '-', 0, 1) eq '-') { # --switches
623 # gross special case since the only git-config options
624 # Consider moving to a table if we need more special cases
625 # we use Getopt::Long for are the ones we reject, so these
626 # are the ones we don't reject:
627 if ($cmd eq 'config') {
628 puts $self, grep(/$re/, keys %CONFIG_KEYS);
629 @spec = qw(add z|null get get-all unset unset-all
630 replace-all get-urlmatch
631 remove-section rename-section
632 name-only list|l edit|e
633 get-color-name get-colorbool);
637 puts $self, grep(/$re/, map { # generate short/long names
639 if (s/=.+\z//) { # required arg, e.g. output|o=i
641 } elsif (s/:.+\z//) { # optional arg, e.g. mid:s
642 } else { # negation: solve! => no-solve|solve
643 s/\A(.+)!\z/no-$1|$1/;
646 length > 1 ? "--$_$eq" : "-$_"
647 } split(/\|/, $_, -1) # help|h
648 } grep { $OPTDESC{"$cmd\t$_"} || $OPTDESC{$_} } @spec);
649 } elsif ($cmd eq 'config' && !@argv && !$CONFIG_KEYS{$cur}) {
650 puts $self, grep(/$re/, keys %CONFIG_KEYS);
652 # TODO: URLs, pathnames, OIDs, MIDs, etc... See optparse() for
656 sub reap_exec { # dwaitpid callback
657 my ($self, $pid) = @_;
661 sub lei_git { # support passing through random git commands
662 my ($self, @argv) = @_;
663 my %rdr = map { $_ => $self->{$_} } (0..2);
664 my $pid = spawn(['git', @argv], $self->{env}, \%rdr);
665 dwaitpid($pid, \&reap_exec, $self);
669 my ($argv, $env) = @_;
670 my $argc = scalar @$argv;
671 my $buf = 'exec '.join("\0", scalar(@$argv), @$argv);
672 while (my ($k, $v) = each %$env) { $buf .= "\0$k=$v" };
677 my ($self, $sock) = @_;
678 my $mua = $self->{opt}->{'mua-cmd'} // return;
679 my $mfolder = $self->{ovv}->{dst};
680 require Text::ParseWords;
682 my @cmd = Text::ParseWords::shellwords($mua);
683 # mutt uses '%f' for open-hook with compressed folders, so we use %f
684 @cmd = map { $_ eq '%f' ? ($replaced = $mfolder) : $_ } @cmd;
685 push @cmd, $mfolder unless defined($replaced);
686 $sock //= $self->{sock};
687 if ($sock) { # lei(1) client process runs it
688 send($sock, exec_buf(\@cmd, {}), MSG_EOR);
690 $self->{"mua.pid.$self.$$"} = spawn(\@cmd);
694 # caller needs to "-t $self->{1}" to check if tty
697 my $env = $self->{env};
698 my $fh = popen_rd([qw(git var GIT_PAGER)], $env);
699 chomp(my $pager = <$fh> // '');
700 close($fh) or warn "`git var PAGER' error: \$?=$?";
701 return if $pager eq 'cat' || $pager eq '';
703 my $new_env = { LESS => 'FRX', LV => '-c', COLUMNS => 80 };
704 $new_env->{MORE} = 'FRX' if $^O eq 'freebsd';
705 pipe(my ($r, $wpager)) or return warn "pipe: $!";
706 my $rdr = { 0 => $r, 1 => $self->{1}, 2 => $self->{2} };
707 my $pgr = [ undef, @$rdr{1, 2}, $$ ];
708 if (my $sock = $self->{sock}) { # lei(1) process runs it
709 delete @$new_env{keys %$env}; # only set iff unset
710 my $fds = [ map { fileno($_) } @$rdr{0..2} ];
711 $send_cmd->($sock, $fds, exec_buf([$pager], $new_env), MSG_EOR);
713 $pgr->[0] = spawn([$pager], $new_env, $rdr);
715 $self->{1} = $wpager;
716 $self->{2} = $wpager if -t $self->{2};
717 $env->{GIT_PAGER_IN_USE} = 'true'; # we may spawn git
723 my $pgr = delete($self->{pgr}) or return;
724 $self->{2} = $pgr->[2];
725 # do not restore original stdout, just close it so we error out
726 close(delete($self->{1})) if $self->{1};
728 dwaitpid($pid, undef, $self->{sock}) if $pid && $pgr->[3] == $$;
731 sub accept_dispatch { # Listener {post_accept} callback
732 my ($sock) = @_; # ignore other
734 my $self = bless { sock => $sock }, __PACKAGE__;
735 vec(my $rvec = '', fileno($sock), 1) = 1;
736 select($rvec, undef, undef, 1) or
737 return send($sock, 'timed out waiting to recv FDs', MSG_EOR);
738 my @fds = $recv_cmd->($sock, my $buf, 4096 * 33); # >MAX_ARG_STRLEN
739 if (scalar(@fds) == 4) {
741 for my $rdr (qw(<&= >&= >&= <&=)) {
742 my $fd = shift(@fds);
743 open($self->{$i++}, $rdr, $fd) and next;
744 send($sock, "open($rdr$fd) (FD=$i): $!", MSG_EOR);
747 return send($sock, "recv_cmd failed: $!", MSG_EOR);
749 $self->{2}->autoflush(1); # keep stdout buffered until x_it|DESTROY
750 # $ENV_STR = join('', map { "\0$_=$ENV{$_}" } keys %ENV);
751 # $buf = "$$\0$argc\0".join("\0", @ARGV).$ENV_STR."\0\0";
752 substr($buf, -2, 2, '') eq "\0\0" or # s/\0\0\z//
753 return send($sock, 'request command truncated', MSG_EOR);
754 my ($argc, @argv) = split(/\0/, $buf, -1);
756 my %env = map { split(/=/, $_, 2) } splice(@argv, $argc);
757 if (chdir(delete($self->{3}))) {
759 $self->{env} = \%env;
760 eval { dispatch($self, @argv) };
761 send($sock, $@, MSG_EOR) if $@;
763 send($sock, "fchdir: $!", MSG_EOR); # implicit close
769 delete $self->{lxs}; # stops LeiXSearch queries
770 close(delete $self->{1}) if $self->{1}; # may reap_compress
771 $self->close if $self->{sock}; # PublicInbox::DS::close
774 # for long-running results
777 local %ENV = %{$self->{env}};
778 my $sock = $self->{sock};
779 local $current_lei = $self;
781 while (my @fds = $recv_cmd->($sock, my $buf, 4096)) {
782 if (scalar(@fds) == 1 && !defined($fds[0])) {
783 return if $! == EAGAIN;
785 last if $! == ECONNRESET;
789 open my $rfh, '+<&=', $fd;
791 die "unrecognized client signal: $buf";
796 eval { $self->fail($err) };
801 sub event_step_init {
803 if (my $sock = $self->{sock}) { # using DS->EventLoop
805 $self->SUPER::new($sock, EPOLLIN|EPOLLET);
811 our $oldset; sub oldset { $oldset }
813 sub dump_and_clear_log {
814 if (defined($errors_log) && -s STDIN && seek(STDIN, 0, SEEK_SET)) {
816 unshift(@pfx, "$errors_log ") if @pfx;
817 warn @pfx, do { local $/; <STDIN> };
818 truncate(STDIN, 0) or warn "ftruncate ($errors_log): $!";
822 # lei(1) calls this when it can't connect
824 my ($path, $errno, $narg) = @_;
825 if ($errno == ECONNREFUSED) {
826 unlink($path) or die "unlink($path): $!";
827 } elsif ($errno != ENOENT) {
828 $! = $errno; # allow interpolation to stringify in die
829 die "connect($path): $!";
831 umask(077) // die("umask(077): $!");
832 socket(my $l, AF_UNIX, SOCK_SEQPACKET, 0) or die "socket: $!";
833 bind($l, pack_sockaddr_un($path)) or die "bind($path): $!";
834 listen($l, 1024) or die "listen: $!";
835 my @st = stat($path) or die "stat($path): $!";
836 my $dev_ino_expect = pack('dd', $st[0], $st[1]); # dev+ino
837 pipe(my ($eof_r, $eof_w)) or die "pipe: $!";
838 local $oldset = PublicInbox::DS::block_signals();
840 $send_cmd = PublicInbox::Spawn->can('send_cmd4');
841 $recv_cmd = PublicInbox::Spawn->can('recv_cmd4') // do {
842 require PublicInbox::CmdIPC4;
843 $send_cmd = PublicInbox::CmdIPC4->can('send_cmd4');
844 PublicInbox::CmdIPC4->can('recv_cmd4');
847 $recv_cmd or die <<"";
848 (Socket::MsgHdr || Inline::C) missing/unconfigured (narg=$narg);
850 require PublicInbox::Listener;
851 require PublicInbox::EOFpipe;
852 (-p STDOUT) or die "E: stdout must be a pipe\n";
854 ($errors_log) = ($path =~ m!\A(.+?/)[^/]+\z!);
855 $errors_log .= 'errors.log';
856 open(STDIN, '+>>', $errors_log) or die "open($errors_log): $!";
858 dump_and_clear_log("from previous daemon process:\n");
859 POSIX::setsid() > 0 or die "setsid: $!";
860 my $pid = fork // die "fork: $!";
862 $0 = "lei-daemon $path";
864 local @TO_CLOSE_ATFORK_CHILD = ($l, $eof_w);
866 $l = PublicInbox::Listener->new($l, \&accept_dispatch, $l);
869 $exit_code //= shift;
870 my $listener = $l or exit($exit_code);
871 # closing eof_w triggers \&noop wakeup
872 $eof_w = $l = $path = undef;
873 $listener->close; # DS::close
874 PublicInbox::DS->SetLoopTimeout(1000);
876 PublicInbox::EOFpipe->new($eof_r, \&noop, undef);
879 CHLD => \&PublicInbox::DS::enqueue_reap,
887 my $sigfd = PublicInbox::Sigfd->new($sig, SFD_NONBLOCK);
888 local @SIG{keys %$sig} = values(%$sig) unless $sigfd;
890 local $SIG{PIPE} = 'IGNORE';
891 if ($sigfd) { # TODO: use inotify/kqueue to detect unlinked sockets
893 PublicInbox::DS->SetLoopTimeout(5000);
895 # wake up every second to accept signals if we don't
896 # have signalfd or IO::KQueue:
897 PublicInbox::DS::sig_setmask($oldset);
898 PublicInbox::DS->SetLoopTimeout(1000);
900 PublicInbox::DS->SetPostLoopCallback(sub {
901 my ($dmap, undef) = @_;
902 if (@st = defined($path) ? stat($path) : ()) {
903 if ($dev_ino_expect ne pack('dd', $st[0], $st[1])) {
904 warn "$path dev/ino changed, quitting\n";
907 } elsif (defined($path)) {
908 warn "stat($path): $!, quitting ...\n";
909 undef $path; # don't unlink
912 return 1 if defined($path);
915 for my $s (values %$dmap) {
916 $s->can('busy') or next;
917 if ($s->busy($now)) {
923 $n; # true: continue, false: stop
926 # STDIN was redirected to /dev/null above, closing STDERR and
927 # STDOUT will cause the calling `lei' client process to finish
928 # reading the <$daemon> pipe.
929 openlog($path, 'pid', 'user');
930 local $SIG{__WARN__} = sub {
931 $current_lei ? err($current_lei, @_) : syslog('warning', "@_");
933 my $on_destroy = PublicInbox::OnDestroy->new($$, sub {
934 syslog('crit', "$@") if $@;
936 open STDERR, '>&STDIN' or die "redirect stderr failed: $!";
937 open STDOUT, '>&STDIN' or die "redirect stdout failed: $!";
938 # $daemon pipe to `lei' closed, main loop begins:
939 PublicInbox::DS->EventLoop;
940 @$on_destroy = (); # cancel on_destroy if we get here
941 exit($exit_code // 0);
944 # for users w/o Socket::Msghdr
947 my $exit = $main_pkg->can('exit'); # caller may override exit()
948 local $quit = $exit if $exit;
950 umask(077) // die("umask(077): $!");
956 }, __PACKAGE__), @ARGV);
959 # ensures stdout hits the FS before sock disconnects so a client
960 # can immediately reread it
963 $self->{1}->autoflush(1) if $self->{1};
965 if (my $mua_pid = delete $self->{"mua.pid.$self.$$"}) {
966 waitpid($mua_pid, 0);