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);
19 use Fcntl qw(SEEK_SET);
20 use Sys::Syslog qw(syslog openlog);
21 use PublicInbox::Config;
22 use PublicInbox::Syscall qw(SFD_NONBLOCK EPOLLIN EPOLLET);
23 use PublicInbox::Sigfd;
24 use PublicInbox::DS qw(now dwaitpid);
25 use PublicInbox::Spawn qw(spawn popen_rd);
26 use PublicInbox::OnDestroy;
27 use Text::Wrap qw(wrap);
28 use Time::HiRes qw(stat); # ctime comparisons for config cache
29 use File::Path qw(mkpath);
31 our $quit = \&CORE::exit;
32 our ($current_lei, $errors_log, $listener);
33 my ($recv_cmd, $send_cmd);
34 my $GLP = Getopt::Long::Parser->new;
35 $GLP->configure(qw(gnu_getopt no_ignore_case auto_abbrev));
36 my $GLP_PASS = Getopt::Long::Parser->new;
37 $GLP_PASS->configure(qw(gnu_getopt no_ignore_case auto_abbrev pass_through));
39 our %PATH2CFG; # persistent for socket daemon
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
71 return $p if index($p, '/') == 0; # already absolute
72 my $pwd = $self->{env}->{PWD};
74 my $cwd = $self->{3} // getcwd() // die "getcwd(PWD=$pwd): $!";
75 if (my @st_pwd = stat($pwd)) {
76 my @st_cwd = stat($cwd) or die "stat($cwd): $!";
77 "@st_pwd[1,0]" eq "@st_cwd[1,0]" or
78 $self->{env}->{PWD} = $pwd = $cwd;
79 } else { # PWD was invalid
80 delete $self->{env}->{PWD};
84 $pwd //= $self->{env}->{PWD} = getcwd() // die "getcwd(PWD=$pwd): $!";
85 File::Spec->rel2abs($p, $pwd);
90 rel2abs($self, ($self->{env}->{XDG_DATA_HOME} //
91 ($self->{env}->{HOME} // '/nonexistent').'/.local/share')
95 sub _config_path ($) {
97 rel2abs($self, ($self->{env}->{XDG_CONFIG_HOME} //
98 ($self->{env}->{HOME} // '/nonexistent').'/.config')
102 # TODO: generate shell completion + help using %CMD and %OPTDESC
103 # command => [ positional_args, 1-line description, Getopt::Long option spec ]
104 our %CMD = ( # sorted in order of importance/use:
105 'q' => [ 'SEARCH_TERMS...', 'search for messages matching terms', qw(
106 save-as=s output|mfolder|o=s format|f=s dedupe|d=s thread|t augment|a
107 sort|s=s reverse|r offset=i remote! local! external! pretty mua-cmd=s
108 torsocks=s no-torsocks verbose|v since|after=s until|before=s),
109 PublicInbox::LeiQuery::curl_opt(), opt_dash('limit|n=i', '[0-9]+') ],
111 'show' => [ 'MID|OID', 'show a given object (Message-ID or object ID)',
112 qw(type=s solve! format|f=s dedupe|d=s thread|t remote local!),
113 pass_through('git show') ],
115 'add-external' => [ 'URL_OR_PATHNAME',
116 'add/set priority of a publicinbox|extindex for extra matches',
117 qw(boost=i quiet|q) ],
118 'ls-external' => [ '[FILTER...]', 'list publicinbox|extindex locations',
119 qw(format|f=s z|0 local remote quiet|q) ],
120 'forget-external' => [ 'URL_OR_PATHNAME...|--prune',
121 'exclude further results from a publicinbox|extindex',
124 'ls-query' => [ '[FILTER...]', 'list saved search queries',
125 qw(name-only format|f=s z) ],
126 'rm-query' => [ 'QUERY_NAME', 'remove a saved search' ],
127 'mv-query' => [ qw(OLD_NAME NEW_NAME), 'rename a saved search' ],
129 'plonk' => [ '--thread|--from=IDENT',
130 'exclude mail matching From: or thread from non-Message-ID searches',
131 qw(stdin| thread|t from|f=s mid=s oid=s) ],
132 'mark' => [ 'MESSAGE_FLAGS...',
133 'set/unset flags on message(s) from stdin',
134 qw(stdin| oid=s exact by-mid|mid:s) ],
135 'forget' => [ '[--stdin|--oid=OID|--by-mid=MID]',
136 "exclude message(s) on stdin from `q' search results",
137 qw(stdin| oid=s exact by-mid|mid:s quiet|q) ],
139 'purge-mailsource' => [ 'URL_OR_PATHNAME|--all',
140 'remove imported messages from IMAP, Maildirs, and MH',
141 qw(exact! all jobs:i indexed) ],
143 # code repos are used for `show' to solve blobs from patch mails
144 'add-coderepo' => [ 'PATHNAME', 'add or set priority of a git code repo',
146 'ls-coderepo' => [ '[FILTER_TERMS...]',
147 'list known code repos', qw(format|f=s z) ],
148 'forget-coderepo' => [ 'PATHNAME',
149 'stop using repo to solve blobs from patches',
152 'add-watch' => [ '[URL_OR_PATHNAME]',
153 'watch for new messages and flag changes',
154 qw(import! flags! interval=s recursive|r exclude=s include=s) ],
155 'ls-watch' => [ '[FILTER...]', 'list active watches with numbers and status',
157 'pause-watch' => [ '[WATCH_NUMBER_OR_FILTER]', qw(all local remote) ],
158 'resume-watch' => [ '[WATCH_NUMBER_OR_FILTER]', qw(all local remote) ],
159 'forget-watch' => [ '{WATCH_NUMBER|--prune}', 'stop and forget a watch',
162 'import' => [ 'URL_OR_PATHNAME|--stdin',
163 'one-shot import/update from URL or filesystem',
164 qw(stdin| offset=i recursive|r exclude=s include=s !flags),
167 'config' => [ '[...]', sub {
168 'git-config(1) wrapper for '._config_path($_[0]);
169 }, qw(config-file|system|global|file|f=s), # for conflict detection
170 pass_through('git config') ],
171 'init' => [ '[PATHNAME]', sub {
172 'initialize storage, default: '._store_path($_[0]);
174 'daemon-kill' => [ '[-SIGNAL]', 'signal the lei-daemon',
175 opt_dash('signal|s=s', '[0-9]+|(?:[A-Z][A-Z0-9]+)') ],
176 'daemon-pid' => [ '', 'show the PID of the lei-daemon' ],
177 'help' => [ '[SUBCOMMAND]', 'show help' ],
179 # XXX do we need this?
180 # 'git' => [ '[ANYTHING...]', 'git(1) wrapper', pass_through('git') ],
182 'reorder-local-store-and-break-history' => [ '[REFNAME]',
183 'rewrite git history in an attempt to improve compression',
186 # internal commands are prefixed with '_'
187 '_complete' => [ '[...]', 'internal shell completion helper',
188 pass_through('everything') ],
191 # switch descriptions, try to keep consistent across commands
192 # $spec: Getopt::Long option specification
193 # $spec => [@ALLOWED_VALUES (default is first), $description],
194 # $spec => $description
195 # "$SUB_COMMAND TAB $spec" => as above
196 my $stdin_formats = [ 'IN|auto|raw|mboxrd|mboxcl2|mboxcl|mboxo',
197 'specify message input format' ];
198 my $ls_format = [ 'OUT|plain|json|null', 'listing output format' ];
201 'help|h' => 'show this built-in help',
202 'quiet|q' => 'be quiet',
203 'solve!' => 'do not attempt to reconstruct blobs from emails',
204 'save-as=s' => ['NAME', 'save a search terms by given name'],
206 'type=s' => [ 'any|mid|git', 'disambiguate type' ],
208 'dedupe|d=s' => ['STRAT|content|oid|mid|none',
209 'deduplication strategy'],
210 'show thread|t' => 'display entire thread a message belongs to',
212 'return all messages in the same thread as the actual match(es)',
213 'augment|a' => 'augment --output destination instead of clobbering',
215 'output|o=s' => [ 'DEST',
216 "destination (e.g. `/path/to/Maildir', or `-' for stdout)" ],
217 'mua-cmd|mua=s' => [ 'COMMAND',
218 "MUA to run on --output Maildir or mbox (e.g. `mutt -f %f'" ],
220 'show format|f=s' => [ 'OUT|plain|raw|html|mboxrd|mboxcl2|mboxcl',
221 'message/object output format' ],
222 'mark format|f=s' => $stdin_formats,
223 'forget format|f=s' => $stdin_formats,
225 'OUT|maildir|mboxrd|mboxcl2|mboxcl|html|json|jsonl|concatjson',
226 'specify output format, default depends on --output'],
227 'ls-query format|f=s' => $ls_format,
228 'ls-external format|f=s' => $ls_format,
230 'limit|n=i@' => ['NUM', 'limit on number of matches (default: 10000)' ],
231 'offset=i' => ['OFF', 'search result offset (default: 0)'],
233 'sort|s=s' => [ 'VAL|received,relevance,docid',
234 "order of results `--output'-dependent"],
235 'reverse|r' => [ 'reverse search results' ], # like sort(1)
237 'boost=i' => 'increase/decrease priority of results (default: 0)',
239 'local' => 'limit operations to the local filesystem',
240 'local!' => 'exclude results from the local filesystem',
241 'remote' => 'limit operations to those requiring network access',
242 'remote!' => 'prevent operations requiring network access',
244 'mid=s' => 'specify the Message-ID of a message',
245 'oid=s' => 'specify the git object ID of a message',
247 'recursive|r' => 'scan directories/mailboxes/newsgroups recursively',
248 'exclude=s' => 'exclude mailboxes/newsgroups based on pattern',
249 'include=s' => 'include mailboxes/newsgroups based on pattern',
251 'exact' => 'operate on exact header matches only',
252 'exact!' => 'rely on content match instead of exact header matches',
254 'by-mid|mid:s' => [ 'MID', 'match only by Message-ID, ignoring contents' ],
255 'jobs:i' => 'set parallelism level',
257 # xargs, env, use "-0", git(1) uses "-z". We support z|0 everywhere
258 'z|0' => 'use NUL \\0 instead of newline (CR) to delimit lines',
260 'signal|s=s' => [ 'SIG', 'signal to send lei-daemon (default: TERM)' ],
264 'leistore.dir' => 'top-level storage location',
267 # pronounced "exit": x_it(1 << 8) => exit(1); x_it(13) => SIGPIPE
269 my ($self, $code) = @_;
270 # make sure client sees stdout before exit
271 $self->{1}->autoflush(1) if $self->{1};
272 dump_and_clear_log();
273 if (my $sock = $self->{sock}) {
274 send($sock, "x_it $code", MSG_EOR);
275 } elsif (!($code & 127)) { # oneshot, ignore signals
276 # don't want to end up using $? from child processes
277 for my $f (qw(lxs l2m)) {
278 my $wq = delete $self->{$f} or next;
285 sub puts ($;@) { print { shift->{1} } map { "$_\n" } @_ }
287 sub out ($;@) { print { shift->{1} } @_ }
291 my $err = $self->{2} // ($self->{pgr} // [])->[2] // *STDERR{IO};
292 print $err @_, (substr($_[-1], -1, 1) eq "\n" ? () : "\n");
295 sub qerr ($;@) { $_[0]->{opt}->{quiet} or err(shift, @_) }
298 my ($self, $buf, $exit_code) = @_;
300 x_it($self, ($exit_code // 1) << 8);
304 sub child_error { # passes non-fatal curl exit codes to user
305 my ($self, $child_error) = @_; # child_error is $?
306 if (my $sock = $self->{sock}) { # send to lei(1) client
307 send($sock, "child_error $child_error", MSG_EOR);
309 $self->{child_error} = $child_error;
314 sub atfork_prepare_wq {
315 my ($self, $wq) = @_;
316 my $tcafc = $wq->{-ipc_atfork_child_close} //= [ $listener // () ];
317 if (my $sock = $self->{sock}) {
318 push @$tcafc, @$self{qw(0 1 2 3)}, $sock;
320 if (my $pgr = $self->{pgr}) {
321 push @$tcafc, @$pgr[1,2];
323 if (my $old_1 = $self->{old_1}) {
324 push @$tcafc, $old_1;
326 for my $f (qw(lxs l2m)) {
327 my $ipc = $self->{$f} or next;
328 push @$tcafc, grep { defined }
329 @$ipc{qw(-wq_s1 -wq_s2 -ipc_req -ipc_res)};
333 # usage: my %sig = $lei->atfork_child_wq($wq);
334 # local @SIG{keys %sig} = values %sig;
335 sub atfork_child_wq {
336 my ($self, $wq) = @_;
337 my ($sock, $l2m_wq_s1);
338 (@$self{qw(0 1 2)}, $sock, $l2m_wq_s1) = delete(@$wq{0..4});
339 $self->{sock} = $sock if -S $sock;
340 $self->{l2m}->{-wq_s1} = $l2m_wq_s1 if $l2m_wq_s1 && -S $l2m_wq_s1;
343 $quit = \&CORE::exit;
344 (__WARN__ => sub { err($self, @_) },
346 $self->x_it(13); # SIGPIPE = 13
347 # we need to close explicitly to avoid Perl warning on SIGPIPE
349 next unless $self->{$i} && (-p $self->{$i} || -S _);
350 close(delete $self->{$i});
352 # trigger the LeiXSearch $done OpPipe:
353 syswrite($self->{0}, '!') if $self->{0} && -p $self->{0};
354 $SIG{PIPE} = 'DEFAULT';
355 die bless(\"$_[0]", 'PublicInbox::SIGPIPE'),
359 # usage: ($lei, @io) = $lei->atfork_parent_wq($wq);
360 sub atfork_parent_wq {
361 my ($self, $wq) = @_;
362 my $env = delete $self->{env}; # env is inherited at fork
363 my $ret = bless { %$self }, ref($self);
364 if (my $dedupe = delete $ret->{dedupe}) {
365 $ret->{dedupe} = $wq->deep_clone($dedupe);
368 delete @$ret{qw(3 -lei_store cfg old_1 pgr lxs)}; # keep l2m
369 my @io = delete @$ret{0..2};
370 $io[3] = delete($ret->{sock}) // $io[2];
371 my $l2m = $ret->{l2m};
372 if ($l2m && $l2m != $wq) { # $wq == lxs
373 $io[4] = $l2m->{-wq_s1} if $l2m->{-wq_s1};
380 my ($self, $errmsg) = @_;
381 my $cmd = $self->{cmd} // 'COMMAND';
382 my @info = @{$CMD{$cmd} // [ '...', '...' ]};
383 my @top = ($cmd, shift(@info) // ());
384 my $cmd_desc = shift(@info);
385 $cmd_desc = $cmd_desc->($self) if ref($cmd_desc) eq 'CODE';
388 for my $sw (grep { !ref } @info) { # ("prio=s", "z", $GLP_PASS)
389 my $desc = $OPTDESC{"$cmd\t$sw"} // $OPTDESC{$sw} // next;
391 ($arg_vals, $desc) = @$desc if ref($desc) eq 'ARRAY';
393 # lower-case is a keyword (e.g. `content', `oid'),
394 # ALL_CAPS is a string description (e.g. `PATH')
395 if ($desc !~ /default/ && $arg_vals =~ /\b([a-z]+)[,\|]/) {
396 $desc .= "\ndefault: `$1'";
400 if ($x =~ s/!\z//) { # solve! => --no-solve
402 } elsif ($x =~ s/:.+//) { # optional args: $x = "mid:s"
403 @vals = (' [', undef, ']');
404 } elsif ($x =~ s/=.+//) { # required arg: $x = "type=s"
405 @vals = (' ', undef);
406 } # else: no args $x = 'thread|t'
407 for (split(/\|/, $x)) { # help|h
408 length($_) > 1 ? push(@l, "--$_") : push(@s, "-$_");
410 if (!scalar(@vals)) { # no args 'thread|t'
411 } elsif ($arg_vals =~ s/\A([A-Z_]+)\b//) { # "NAME"
414 $vals[1] = uc(substr($l[0], 2)); # "--type" => "TYPE"
416 if ($arg_vals =~ /([,\|])/) {
418 my @allow = split(/\Q$sep\E/, $arg_vals);
419 my $must = $sep eq '|' ? 'Must' : 'Can';
420 @allow = map { "`$_'" } @allow;
421 my $last = pop @allow;
422 $desc .= "\n$must be one of: " .
423 join(', ', @allow) . " or $last";
425 my $lhs = join(', ', @s, @l) . join('', @vals);
426 if ($x =~ /\|\z/) { # "stdin|" or "clear|"
427 $lhs =~ s/\A--/- , --/;
429 $lhs =~ s/\A--/ --/; # pad if no short options
431 $lpad = length($lhs) if length($lhs) > $lpad;
432 push @opt_desc, $lhs, $desc;
434 my $msg = $errmsg ? "E: $errmsg\n" : '';
441 local $Text::Wrap::columns = 78 - $lpad;
442 my $padding = ' ' x ($lpad + 2);
443 while (my ($lhs, $rhs) = splice(@opt_desc, 0, 2)) {
444 $msg .= ' '.pack("A$lpad", $lhs);
445 $rhs = wrap('', '', $rhs);
446 $rhs =~ s/\n/\n$padding/sg; # LHS pad continuation lines
450 print { $self->{$errmsg ? 2 : 1} } $msg;
451 x_it($self, $errmsg ? 1 << 8 : 0); # stderr => failure
456 my ($self, $cmd, $argv) = @_;
458 $OPT = $self->{opt} = {};
459 my $info = $CMD{$cmd} // [ '[...]' ];
460 my ($proto, undef, @spec) = @$info;
461 my $glp = ref($spec[-1]) eq ref($GLP) ? pop(@spec) : $GLP;
462 push @spec, qw(help|h);
464 if ($spec[0] =~ s/\|\z//s) { # "stdin|" or "clear|" allows "-" alias
465 $lone_dash = $spec[0];
466 $OPT->{$spec[0]} = \(my $var);
467 push @spec, '' => \$var;
469 $glp->getoptionsfromarray($argv, $OPT, @spec) or
470 return _help($self, "bad arguments or options for $cmd");
471 return _help($self) if $OPT->{help};
473 push @$argv, @{$OPT->{-argv}} if defined($OPT->{-argv});
475 # "-" aliases "stdin" or "clear"
476 $OPT->{$lone_dash} = ${$OPT->{$lone_dash}} if defined $lone_dash;
479 my $POS_ARG = '[A-Z][A-Z0-9_]+';
481 my @args = split(/ /, $proto);
482 for my $var (@args) {
483 if ($var =~ /\A$POS_ARG\.\.\.\z/o) { # >= 1 args;
484 $inf = defined($argv->[$i]) and last;
485 $var =~ s/\.\.\.\z//;
486 $err = "$var not supplied";
487 } elsif ($var =~ /\A$POS_ARG\z/o) { # required arg at $i
488 $argv->[$i++] // ($err = "$var not supplied");
489 } elsif ($var =~ /\.\.\.\]\z/) { # optional args start
492 } elsif ($var =~ /\A\[-?$POS_ARG\]\z/) { # one optional arg
494 } elsif ($var =~ /\A.+?\|/) { # required FOO|--stdin
495 my @or = split(/\|/, $var);
498 if ($o =~ /\A--([a-z0-9\-]+)/) {
499 $ok = defined($OPT->{$1});
501 } elsif (defined($argv->[$i])) {
505 } # else continue looping
509 $err = join(', ', @or) . " or $last must be set";
511 warn "BUG: can't parse `$var' in $proto";
515 if (!$inf && scalar(@$argv) > scalar(@args)) {
516 $err //= 'too many arguments';
518 $err ? fail($self, "usage: lei $cmd $proto\nE: $err") : 1;
522 my ($self, $cmd, @argv) = @_;
523 local $current_lei = $self; # for __WARN__
524 dump_and_clear_log("from previous run\n");
525 return _help($self, 'no command given') unless defined($cmd);
526 my $func = "lei_$cmd";
528 if (my $cb = __PACKAGE__->can($func)) {
529 optparse($self, $cmd, \@argv) or return;
531 } elsif (grep(/\A-/, $cmd, @argv)) { # --help or -h only
533 $GLP->getoptionsfromarray([$cmd, @argv], $opt, qw(help|h)) or
534 return _help($self, 'bad arguments or options');
537 fail($self, "`$cmd' is not an lei command");
542 my ($self, $creat) = @_;
543 my $f = _config_path($self);
545 my $cur_st = @st ? pack('dd', $st[10], $st[7]) : ''; # 10:ctime, 7:size
546 if (my $cfg = $PATH2CFG{$f}) { # reuse existing object in common case
547 return ($self->{cfg} = $cfg) if $cur_st eq $cfg->{-st};
554 my (undef, $cfg_dir, undef) = File::Spec->splitpath($f);
555 -d $cfg_dir or mkpath($cfg_dir) or die "mkpath($cfg_dir): $!\n";
556 open my $fh, '>>', $f or die "open($f): $!\n";
557 @st = stat($fh) or die "fstat($f): $!\n";
558 $cur_st = pack('dd', $st[10], $st[7]);
559 qerr($self, "I: $f created") if $self->{cmd} ne 'config';
561 my $cfg = PublicInbox::Config::git_config_dump($f);
562 $cfg->{-st} = $cur_st;
564 $self->{cfg} = $PATH2CFG{$f} = $cfg;
567 sub _lei_store ($;$) {
568 my ($self, $creat) = @_;
569 my $cfg = _lei_cfg($self, $creat);
570 $cfg->{-lei_store} //= do {
571 require PublicInbox::LeiStore;
572 my $dir = $cfg->{'leistore.dir'};
573 $dir //= $creat ? _store_path($self) : return;
574 PublicInbox::LeiStore->new($dir, { creat => $creat });
579 my ($self, @argv) = @_;
583 my ($self, @argv) = @_;
587 my ($self, @argv) = @_;
588 my $env = $self->{env};
589 delete local $env->{GIT_CONFIG};
590 delete local $ENV{GIT_CONFIG};
591 my $cfg = _lei_cfg($self, 1);
592 my $cmd = [ qw(git config -f), $cfg->{'-f'}, @argv ];
593 my %rdr = map { $_ => $self->{$_} } (0..2);
594 waitpid(spawn($cmd, $env, \%rdr), 0);
598 my ($self, @argv) = @_;
599 $self->{opt}->{'config-file'} and return fail $self,
600 "config file switches not supported by `lei config'";
602 x_it($self, $?) if $?;
606 my ($self, $dir) = @_;
607 my $cfg = _lei_cfg($self, 1);
608 my $cur = $cfg->{'leistore.dir'};
609 $dir //= _store_path($self);
610 $dir = rel2abs($self, $dir);
611 my @cur = stat($cur) if defined($cur);
612 $cur = File::Spec->canonpath($cur // $dir);
613 my @dir = stat($dir);
614 my $exists = "I: leistore.dir=$cur already initialized" if @dir;
617 _lei_store($self, 1)->done;
618 return qerr($self, $exists);
621 # some folks like symlinks and bind mounts :P
622 if (@dir && "@cur[1,0]" eq "@dir[1,0]") {
623 lei_config($self, 'leistore.dir', $dir);
624 _lei_store($self, 1)->done;
625 return qerr($self, "$exists (as $cur)");
627 return fail($self, <<"");
628 E: leistore.dir=$cur already initialized and it is not $dir
631 lei_config($self, 'leistore.dir', $dir);
632 _lei_store($self, 1)->done;
633 $exists //= "I: leistore.dir=$dir newly initialized";
634 return qerr($self, $exists);
637 sub lei_daemon_pid { puts shift, $$ }
639 sub lei_daemon_kill {
641 my $sig = $self->{opt}->{signal} // 'TERM';
642 kill($sig, $$) or fail($self, "kill($sig, $$): $!");
645 sub lei_help { _help($_[0]) }
647 # Shell completion helper. Used by lei-completion.bash and hopefully
648 # other shells. Try to do as much here as possible to avoid redundancy
649 # and improve maintainability.
651 my ($self, @argv) = @_; # argv = qw(lei and any other args...)
652 shift @argv; # ignore "lei", the entire command is sent
653 @argv or return puts $self, grep(!/^_/, keys %CMD), qw(--help -h);
654 my $cmd = shift @argv;
655 my $info = $CMD{$cmd} // do { # filter matching commands
656 @argv or puts $self, grep(/\A\Q$cmd\E/, keys %CMD);
659 my ($proto, undef, @spec) = @$info;
661 my $re = defined($cur) ? qr/\A\Q$cur\E/ : qr/./;
662 if (substr($cur // '-', 0, 1) eq '-') { # --switches
663 # gross special case since the only git-config options
664 # Consider moving to a table if we need more special cases
665 # we use Getopt::Long for are the ones we reject, so these
666 # are the ones we don't reject:
667 if ($cmd eq 'config') {
668 puts $self, grep(/$re/, keys %CONFIG_KEYS);
669 @spec = qw(add z|null get get-all unset unset-all
670 replace-all get-urlmatch
671 remove-section rename-section
672 name-only list|l edit|e
673 get-color-name get-colorbool);
677 puts $self, grep(/$re/, map { # generate short/long names
679 if (s/=.+\z//) { # required arg, e.g. output|o=i
681 } elsif (s/:.+\z//) { # optional arg, e.g. mid:s
682 } else { # negation: solve! => no-solve|solve
683 s/\A(.+)!\z/no-$1|$1/;
686 length > 1 ? "--$_$eq" : "-$_"
687 } split(/\|/, $_, -1) # help|h
688 } grep { $OPTDESC{"$cmd\t$_"} || $OPTDESC{$_} } @spec);
689 } elsif ($cmd eq 'config' && !@argv && !$CONFIG_KEYS{$cur}) {
690 puts $self, grep(/$re/, keys %CONFIG_KEYS);
693 if (my $sub = $self->can("_complete_$cmd")) {
694 puts $self, $sub->($self, @argv, $cur);
696 # TODO: URLs, pathnames, OIDs, MIDs, etc... See optparse() for
701 my ($argv, $env) = @_;
702 my $argc = scalar @$argv;
703 my $buf = 'exec '.join("\0", scalar(@$argv), @$argv);
704 while (my ($k, $v) = each %$env) { $buf .= "\0$k=$v" };
710 my $mua = $self->{opt}->{'mua-cmd'} // return;
711 my $mfolder = $self->{ovv}->{dst};
712 my (@cmd, $replaced);
713 if ($mua =~ /\A(?:mutt|mailx|mail|neomutt)\z/) {
715 # TODO: help wanted: other common FOSS MUAs
717 require Text::ParseWords;
718 my @cmd = Text::ParseWords::shellwords($mua);
719 # mutt uses '%f' for open-hook with compressed mbox, we follow
720 @cmd = map { $_ eq '%f' ? ($replaced = $mfolder) : $_ } @cmd;
722 push @cmd, $mfolder unless defined($replaced);
723 if (my $sock = $self->{sock}) { # lei(1) client process runs it
724 send($sock, exec_buf(\@cmd, {}), MSG_EOR);
726 $self->{"mua.pid.$self.$$"} = spawn(\@cmd);
730 # caller needs to "-t $self->{1}" to check if tty
733 my $env = $self->{env};
734 my $fh = popen_rd([qw(git var GIT_PAGER)], $env);
735 chomp(my $pager = <$fh> // '');
736 close($fh) or warn "`git var PAGER' error: \$?=$?";
737 return if $pager eq 'cat' || $pager eq '';
739 my $new_env = { LESS => 'FRX', LV => '-c', COLUMNS => 80 };
740 $new_env->{MORE} = 'FRX' if $^O eq 'freebsd';
741 pipe(my ($r, $wpager)) or return warn "pipe: $!";
742 my $rdr = { 0 => $r, 1 => $self->{1}, 2 => $self->{2} };
743 my $pgr = [ undef, @$rdr{1, 2}, $$ ];
744 if (my $sock = $self->{sock}) { # lei(1) process runs it
745 delete @$new_env{keys %$env}; # only set iff unset
746 my $fds = [ map { fileno($_) } @$rdr{0..2} ];
747 $send_cmd->($sock, $fds, exec_buf([$pager], $new_env), MSG_EOR);
749 $pgr->[0] = spawn([$pager], $new_env, $rdr);
751 $self->{1} = $wpager;
752 $self->{2} = $wpager if -t $self->{2};
753 $env->{GIT_PAGER_IN_USE} = 'true'; # we may spawn git
759 my $pgr = delete($self->{pgr}) or return;
760 $self->{2} = $pgr->[2];
761 # do not restore original stdout, just close it so we error out
762 close(delete($self->{1})) if $self->{1};
764 dwaitpid($pid, undef, $self->{sock}) if $pid && $pgr->[3] == $$;
767 sub accept_dispatch { # Listener {post_accept} callback
768 my ($sock) = @_; # ignore other
770 my $self = bless { sock => $sock }, __PACKAGE__;
771 vec(my $rvec = '', fileno($sock), 1) = 1;
772 select($rvec, undef, undef, 1) or
773 return send($sock, 'timed out waiting to recv FDs', MSG_EOR);
774 my @fds = $recv_cmd->($sock, my $buf, 4096 * 33); # >MAX_ARG_STRLEN
775 if (scalar(@fds) == 4) {
777 my $fd = shift(@fds);
778 open($self->{$i}, '+<&=', $fd) and next;
779 send($sock, "open(+<&=$fd) (FD=$i): $!", MSG_EOR);
782 return send($sock, "recv_cmd failed: $!", MSG_EOR);
784 $self->{2}->autoflush(1); # keep stdout buffered until x_it|DESTROY
785 # $ENV_STR = join('', map { "\0$_=$ENV{$_}" } keys %ENV);
786 # $buf = "$argc\0".join("\0", @ARGV).$ENV_STR."\0\0";
787 substr($buf, -2, 2, '') eq "\0\0" or # s/\0\0\z//
788 return send($sock, 'request command truncated', MSG_EOR);
789 my ($argc, @argv) = split(/\0/, $buf, -1);
791 my %env = map { split(/=/, $_, 2) } splice(@argv, $argc);
792 if (chdir($self->{3})) {
794 $self->{env} = \%env;
795 eval { dispatch($self, @argv) };
796 send($sock, $@, MSG_EOR) if $@;
798 send($sock, "fchdir: $!", MSG_EOR); # implicit close
804 for my $f (qw(lxs l2m)) {
805 my $wq = delete $self->{$f} or next;
808 } elsif ($wq->wq_kill_old) {
812 close(delete $self->{1}) if $self->{1}; # may reap_compress
813 $self->close if $self->{sock}; # PublicInbox::DS::close
816 # for long-running results
819 local %ENV = %{$self->{env}};
820 my $sock = $self->{sock};
821 local $current_lei = $self;
823 while (my @fds = $recv_cmd->($sock, my $buf, 4096)) {
824 if (scalar(@fds) == 1 && !defined($fds[0])) {
825 return if $! == EAGAIN;
827 last if $! == ECONNRESET;
831 open my $rfh, '+<&=', $fd;
833 die "unrecognized client signal: $buf";
838 eval { $self->fail($err) };
843 sub event_step_init {
845 if (my $sock = $self->{sock}) { # using DS->EventLoop
847 $self->SUPER::new($sock, EPOLLIN|EPOLLET);
853 our $oldset; sub oldset { $oldset }
855 sub dump_and_clear_log {
856 if (defined($errors_log) && -s STDIN && seek(STDIN, 0, SEEK_SET)) {
858 unshift(@pfx, "$errors_log ") if @pfx;
859 warn @pfx, do { local $/; <STDIN> };
860 truncate(STDIN, 0) or warn "ftruncate ($errors_log): $!";
864 # lei(1) calls this when it can't connect
866 my ($path, $errno, $narg) = @_;
867 if ($errno == ECONNREFUSED) {
868 unlink($path) or die "unlink($path): $!";
869 } elsif ($errno != ENOENT) {
870 $! = $errno; # allow interpolation to stringify in die
871 die "connect($path): $!";
873 umask(077) // die("umask(077): $!");
875 socket($listener, AF_UNIX, SOCK_SEQPACKET, 0) or die "socket: $!";
876 bind($listener, pack_sockaddr_un($path)) or die "bind($path): $!";
877 listen($listener, 1024) or die "listen: $!";
878 my @st = stat($path) or die "stat($path): $!";
879 my $dev_ino_expect = pack('dd', $st[0], $st[1]); # dev+ino
880 local $oldset = PublicInbox::DS::block_signals();
882 $send_cmd = PublicInbox::Spawn->can('send_cmd4');
883 $recv_cmd = PublicInbox::Spawn->can('recv_cmd4') // do {
884 require PublicInbox::CmdIPC4;
885 $send_cmd = PublicInbox::CmdIPC4->can('send_cmd4');
886 PublicInbox::CmdIPC4->can('recv_cmd4');
889 $recv_cmd or die <<"";
890 (Socket::MsgHdr || Inline::C) missing/unconfigured (narg=$narg);
892 require PublicInbox::Listener;
893 require PublicInbox::EOFpipe;
894 (-p STDOUT) or die "E: stdout must be a pipe\n";
896 ($errors_log) = ($path =~ m!\A(.+?/)[^/]+\z!);
897 $errors_log .= 'errors.log';
898 open(STDIN, '+>>', $errors_log) or die "open($errors_log): $!";
900 dump_and_clear_log("from previous daemon process:\n");
901 POSIX::setsid() > 0 or die "setsid: $!";
902 my $pid = fork // die "fork: $!";
904 $0 = "lei-daemon $path";
906 $listener->blocking(0);
908 my $pil = PublicInbox::Listener->new($listener, \&accept_dispatch);
910 pipe(my ($eof_r, $eof_w)) or die "pipe: $!";
911 PublicInbox::EOFpipe->new($eof_r, \&noop, undef);
913 $exit_code //= shift;
914 my $lis = $pil or exit($exit_code);
915 # closing eof_w triggers \&noop wakeup
916 $listener = $eof_w = $pil = $path = undef;
917 $lis->close; # DS::close
918 PublicInbox::DS->SetLoopTimeout(1000);
922 CHLD => \&PublicInbox::DS::enqueue_reap,
930 my $sigfd = PublicInbox::Sigfd->new($sig, SFD_NONBLOCK);
931 local @SIG{keys %$sig} = values(%$sig) unless $sigfd;
933 local $SIG{PIPE} = 'IGNORE';
934 if ($sigfd) { # TODO: use inotify/kqueue to detect unlinked sockets
936 PublicInbox::DS->SetLoopTimeout(5000);
938 # wake up every second to accept signals if we don't
939 # have signalfd or IO::KQueue:
940 PublicInbox::DS::sig_setmask($oldset);
941 PublicInbox::DS->SetLoopTimeout(1000);
943 PublicInbox::DS->SetPostLoopCallback(sub {
944 my ($dmap, undef) = @_;
945 if (@st = defined($path) ? stat($path) : ()) {
946 if ($dev_ino_expect ne pack('dd', $st[0], $st[1])) {
947 warn "$path dev/ino changed, quitting\n";
950 } elsif (defined($path)) {
951 warn "stat($path): $!, quitting ...\n";
952 undef $path; # don't unlink
955 return 1 if defined($path);
958 for my $s (values %$dmap) {
959 $s->can('busy') or next;
960 if ($s->busy($now)) {
966 $n; # true: continue, false: stop
969 # STDIN was redirected to /dev/null above, closing STDERR and
970 # STDOUT will cause the calling `lei' client process to finish
971 # reading the <$daemon> pipe.
972 openlog($path, 'pid', 'user');
973 local $SIG{__WARN__} = sub {
974 $current_lei ? err($current_lei, @_) : syslog('warning', "@_");
976 my $on_destroy = PublicInbox::OnDestroy->new($$, sub {
977 syslog('crit', "$@") if $@;
979 open STDERR, '>&STDIN' or die "redirect stderr failed: $!";
980 open STDOUT, '>&STDIN' or die "redirect stdout failed: $!";
981 # $daemon pipe to `lei' closed, main loop begins:
982 PublicInbox::DS->EventLoop;
983 @$on_destroy = (); # cancel on_destroy if we get here
984 exit($exit_code // 0);
987 # for users w/o Socket::Msghdr installed or Inline::C enabled
990 my $exit = $main_pkg->can('exit'); # caller may override exit()
991 local $quit = $exit if $exit;
993 umask(077) // die("umask(077): $!");
1000 dispatch($self, @ARGV);
1001 x_it($self, $self->{child_error}) if $self->{child_error};
1004 # ensures stdout hits the FS before sock disconnects so a client
1005 # can immediately reread it
1008 $self->{1}->autoflush(1) if $self->{1};
1010 if (my $mua_pid = delete $self->{"mua.pid.$self.$$"}) {
1011 waitpid($mua_pid, 0);