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
108 mua-cmd|mua=s no-torsocks torsocks=s verbose|v
109 received-after=s received-before=s sent-after=s sent-since=s),
110 PublicInbox::LeiQuery::curl_opt(), opt_dash('limit|n=i', '[0-9]+') ],
112 'show' => [ 'MID|OID', 'show a given object (Message-ID or object ID)',
113 qw(type=s solve! format|f=s dedupe|d=s thread|t remote local!),
114 pass_through('git show') ],
116 'add-external' => [ 'URL_OR_PATHNAME',
117 'add/set priority of a publicinbox|extindex for extra matches',
118 qw(boost=i quiet|q) ],
119 'ls-external' => [ '[FILTER...]', 'list publicinbox|extindex locations',
120 qw(format|f=s z|0 local remote quiet|q) ],
121 'forget-external' => [ 'URL_OR_PATHNAME...|--prune',
122 'exclude further results from a publicinbox|extindex',
125 'ls-query' => [ '[FILTER...]', 'list saved search queries',
126 qw(name-only format|f=s z) ],
127 'rm-query' => [ 'QUERY_NAME', 'remove a saved search' ],
128 'mv-query' => [ qw(OLD_NAME NEW_NAME), 'rename a saved search' ],
130 'plonk' => [ '--thread|--from=IDENT',
131 'exclude mail matching From: or thread from non-Message-ID searches',
132 qw(stdin| thread|t from|f=s mid=s oid=s) ],
133 'mark' => [ 'MESSAGE_FLAGS...',
134 'set/unset flags on message(s) from stdin',
135 qw(stdin| oid=s exact by-mid|mid:s) ],
136 'forget' => [ '[--stdin|--oid=OID|--by-mid=MID]',
137 "exclude message(s) on stdin from `q' search results",
138 qw(stdin| oid=s exact by-mid|mid:s quiet|q) ],
140 'purge-mailsource' => [ 'URL_OR_PATHNAME|--all',
141 'remove imported messages from IMAP, Maildirs, and MH',
142 qw(exact! all jobs:i indexed) ],
144 # code repos are used for `show' to solve blobs from patch mails
145 'add-coderepo' => [ 'PATHNAME', 'add or set priority of a git code repo',
147 'ls-coderepo' => [ '[FILTER_TERMS...]',
148 'list known code repos', qw(format|f=s z) ],
149 'forget-coderepo' => [ 'PATHNAME',
150 'stop using repo to solve blobs from patches',
153 'add-watch' => [ '[URL_OR_PATHNAME]',
154 'watch for new messages and flag changes',
155 qw(import! flags! interval=s recursive|r exclude=s include=s) ],
156 'ls-watch' => [ '[FILTER...]', 'list active watches with numbers and status',
158 'pause-watch' => [ '[WATCH_NUMBER_OR_FILTER]', qw(all local remote) ],
159 'resume-watch' => [ '[WATCH_NUMBER_OR_FILTER]', qw(all local remote) ],
160 'forget-watch' => [ '{WATCH_NUMBER|--prune}', 'stop and forget a watch',
163 'import' => [ 'URL_OR_PATHNAME|--stdin',
164 'one-shot import/update from URL or filesystem',
165 qw(stdin| offset=i recursive|r exclude=s include=s !flags),
168 'config' => [ '[...]', sub {
169 'git-config(1) wrapper for '._config_path($_[0]);
170 }, qw(config-file|system|global|file|f=s), # for conflict detection
171 pass_through('git config') ],
172 'init' => [ '[PATHNAME]', sub {
173 'initialize storage, default: '._store_path($_[0]);
175 'daemon-kill' => [ '[-SIGNAL]', 'signal the lei-daemon',
176 opt_dash('signal|s=s', '[0-9]+|(?:[A-Z][A-Z0-9]+)') ],
177 'daemon-pid' => [ '', 'show the PID of the lei-daemon' ],
178 'help' => [ '[SUBCOMMAND]', 'show help' ],
180 # XXX do we need this?
181 # 'git' => [ '[ANYTHING...]', 'git(1) wrapper', pass_through('git') ],
183 'reorder-local-store-and-break-history' => [ '[REFNAME]',
184 'rewrite git history in an attempt to improve compression',
187 # internal commands are prefixed with '_'
188 '_complete' => [ '[...]', 'internal shell completion helper',
189 pass_through('everything') ],
192 # switch descriptions, try to keep consistent across commands
193 # $spec: Getopt::Long option specification
194 # $spec => [@ALLOWED_VALUES (default is first), $description],
195 # $spec => $description
196 # "$SUB_COMMAND TAB $spec" => as above
197 my $stdin_formats = [ 'IN|auto|raw|mboxrd|mboxcl2|mboxcl|mboxo',
198 'specify message input format' ];
199 my $ls_format = [ 'OUT|plain|json|null', 'listing output format' ];
202 'help|h' => 'show this built-in help',
203 'quiet|q' => 'be quiet',
204 'verbose|v' => 'be more verbose',
205 'solve!' => 'do not attempt to reconstruct blobs from emails',
206 'torsocks=s' => ['auto|no|yes',
207 'whether or not to wrap git and curl commands with torsocks'],
208 'no-torsocks' => 'alias for --torsocks=no',
209 'save-as=s' => ['NAME', 'save a search terms by given name'],
211 'type=s' => [ 'any|mid|git', 'disambiguate type' ],
213 'dedupe|d=s' => ['STRAT|content|oid|mid|none',
214 'deduplication strategy'],
215 'show thread|t' => 'display entire thread a message belongs to',
217 'return all messages in the same thread as the actual match(es)',
218 'augment|a' => 'augment --output destination instead of clobbering',
220 'output|mfolder|o=s' => [ 'DEST',
221 "destination (e.g. `/path/to/Maildir', or `-' for stdout)" ],
222 'mua-cmd|mua=s' => [ 'COMMAND',
223 "MUA to run on --output Maildir or mbox (e.g. `mutt -f %f'" ],
225 'show format|f=s' => [ 'OUT|plain|raw|html|mboxrd|mboxcl2|mboxcl',
226 'message/object output format' ],
227 'mark format|f=s' => $stdin_formats,
228 'forget format|f=s' => $stdin_formats,
230 'OUT|maildir|mboxrd|mboxcl2|mboxcl|mboxo|html|json|jsonl|concatjson',
231 'specify output format, default depends on --output'],
232 'ls-query format|f=s' => $ls_format,
233 'ls-external format|f=s' => $ls_format,
235 'limit|n=i@' => ['NUM', 'limit on number of matches (default: 10000)' ],
236 'offset=i' => ['OFF', 'search result offset (default: 0)'],
238 'sort|s=s' => [ 'VAL|received,relevance,docid',
239 "order of results `--output'-dependent"],
240 'reverse|r' => [ 'reverse search results' ], # like sort(1)
242 'boost=i' => 'increase/decrease priority of results (default: 0)',
244 'local' => 'limit operations to the local filesystem',
245 'local!' => 'exclude results from the local filesystem',
246 'remote' => 'limit operations to those requiring network access',
247 'remote!' => 'prevent operations requiring network access',
249 'mid=s' => 'specify the Message-ID of a message',
250 'oid=s' => 'specify the git object ID of a message',
252 'recursive|r' => 'scan directories/mailboxes/newsgroups recursively',
253 'exclude=s' => 'exclude mailboxes/newsgroups based on pattern',
254 'include=s' => 'include mailboxes/newsgroups based on pattern',
256 'exact' => 'operate on exact header matches only',
257 'exact!' => 'rely on content match instead of exact header matches',
259 'by-mid|mid:s' => [ 'MID', 'match only by Message-ID, ignoring contents' ],
260 'jobs:i' => 'set parallelism level',
262 # xargs, env, use "-0", git(1) uses "-z". We support z|0 everywhere
263 'z|0' => 'use NUL \\0 instead of newline (CR) to delimit lines',
265 'signal|s=s' => [ 'SIG', 'signal to send lei-daemon (default: TERM)' ],
269 'leistore.dir' => 'top-level storage location',
272 # pronounced "exit": x_it(1 << 8) => exit(1); x_it(13) => SIGPIPE
274 my ($self, $code) = @_;
275 # make sure client sees stdout before exit
276 $self->{1}->autoflush(1) if $self->{1};
277 dump_and_clear_log();
278 if (my $sock = $self->{sock}) {
279 send($sock, "x_it $code", MSG_EOR);
280 } elsif (!($code & 127)) { # oneshot, ignore signals
281 # don't want to end up using $? from child processes
282 for my $f (qw(lxs l2m)) {
283 my $wq = delete $self->{$f} or next;
290 sub puts ($;@) { print { shift->{1} } map { "$_\n" } @_ }
292 sub out ($;@) { print { shift->{1} } @_ }
296 my $err = $self->{2} // ($self->{pgr} // [])->[2] // *STDERR{IO};
297 print $err @_, (substr($_[-1], -1, 1) eq "\n" ? () : "\n");
300 sub qerr ($;@) { $_[0]->{opt}->{quiet} or err(shift, @_) }
303 my ($self, $buf, $exit_code) = @_;
305 x_it($self, ($exit_code // 1) << 8);
309 sub child_error { # passes non-fatal curl exit codes to user
310 my ($self, $child_error) = @_; # child_error is $?
311 if (my $sock = $self->{sock}) { # send to lei(1) client
312 send($sock, "child_error $child_error", MSG_EOR);
314 $self->{child_error} = $child_error;
319 sub atfork_prepare_wq {
320 my ($self, $wq) = @_;
321 my $tcafc = $wq->{-ipc_atfork_child_close} //= [ $listener // () ];
322 if (my $sock = $self->{sock}) {
323 push @$tcafc, @$self{qw(0 1 2 3)}, $sock;
325 if (my $pgr = $self->{pgr}) {
326 push @$tcafc, @$pgr[1,2];
328 if (my $old_1 = $self->{old_1}) {
329 push @$tcafc, $old_1;
331 for my $f (qw(lxs l2m)) {
332 my $ipc = $self->{$f} or next;
333 push @$tcafc, grep { defined }
334 @$ipc{qw(-wq_s1 -wq_s2 -ipc_req -ipc_res)};
338 # usage: my %sig = $lei->atfork_child_wq($wq);
339 # local @SIG{keys %sig} = values %sig;
340 sub atfork_child_wq {
341 my ($self, $wq) = @_;
342 my ($sock, $l2m_wq_s1);
343 (@$self{qw(0 1 2)}, $sock, $l2m_wq_s1) = delete(@$wq{0..4});
344 $self->{sock} = $sock if -S $sock;
345 $self->{l2m}->{-wq_s1} = $l2m_wq_s1 if $l2m_wq_s1 && -S $l2m_wq_s1;
348 $quit = \&CORE::exit;
349 (__WARN__ => sub { err($self, @_) },
351 $self->x_it(13); # SIGPIPE = 13
352 # we need to close explicitly to avoid Perl warning on SIGPIPE
354 next unless $self->{$i} && (-p $self->{$i} || -S _);
355 close(delete $self->{$i});
357 # trigger the LeiXSearch $done OpPipe:
358 syswrite($self->{0}, '!') if $self->{0} && -p $self->{0};
359 $SIG{PIPE} = 'DEFAULT';
360 die bless(\"$_[0]", 'PublicInbox::SIGPIPE'),
364 # usage: ($lei, @io) = $lei->atfork_parent_wq($wq);
365 sub atfork_parent_wq {
366 my ($self, $wq) = @_;
367 my $env = delete $self->{env}; # env is inherited at fork
368 my $ret = bless { %$self }, ref($self);
369 if (my $dedupe = delete $ret->{dedupe}) {
370 $ret->{dedupe} = $wq->deep_clone($dedupe);
373 delete @$ret{qw(3 -lei_store cfg old_1 pgr lxs)}; # keep l2m
374 my @io = delete @$ret{0..2};
375 $io[3] = delete($ret->{sock}) // $io[2];
376 my $l2m = $ret->{l2m};
377 if ($l2m && $l2m != $wq) { # $wq == lxs
378 $io[4] = $l2m->{-wq_s1} if $l2m->{-wq_s1};
385 my ($self, $errmsg) = @_;
386 my $cmd = $self->{cmd} // 'COMMAND';
387 my @info = @{$CMD{$cmd} // [ '...', '...' ]};
388 my @top = ($cmd, shift(@info) // ());
389 my $cmd_desc = shift(@info);
390 $cmd_desc = $cmd_desc->($self) if ref($cmd_desc) eq 'CODE';
393 for my $sw (grep { !ref } @info) { # ("prio=s", "z", $GLP_PASS)
394 my $desc = $OPTDESC{"$cmd\t$sw"} // $OPTDESC{$sw} // next;
396 ($arg_vals, $desc) = @$desc if ref($desc) eq 'ARRAY';
398 # lower-case is a keyword (e.g. `content', `oid'),
399 # ALL_CAPS is a string description (e.g. `PATH')
400 if ($desc !~ /default/ && $arg_vals =~ /\b([a-z]+)[,\|]/) {
401 $desc .= "\ndefault: `$1'";
405 if ($x =~ s/!\z//) { # solve! => --no-solve
407 } elsif ($x =~ s/:.+//) { # optional args: $x = "mid:s"
408 @vals = (' [', undef, ']');
409 } elsif ($x =~ s/=.+//) { # required arg: $x = "type=s"
410 @vals = (' ', undef);
411 } # else: no args $x = 'thread|t'
412 for (split(/\|/, $x)) { # help|h
413 length($_) > 1 ? push(@l, "--$_") : push(@s, "-$_");
415 if (!scalar(@vals)) { # no args 'thread|t'
416 } elsif ($arg_vals =~ s/\A([A-Z_]+)\b//) { # "NAME"
419 $vals[1] = uc(substr($l[0], 2)); # "--type" => "TYPE"
421 if ($arg_vals =~ /([,\|])/) {
423 my @allow = split(/\Q$sep\E/, $arg_vals);
424 my $must = $sep eq '|' ? 'Must' : 'Can';
425 @allow = map { "`$_'" } @allow;
426 my $last = pop @allow;
427 $desc .= "\n$must be one of: " .
428 join(', ', @allow) . " or $last";
430 my $lhs = join(', ', @s, @l) . join('', @vals);
431 if ($x =~ /\|\z/) { # "stdin|" or "clear|"
432 $lhs =~ s/\A--/- , --/;
434 $lhs =~ s/\A--/ --/; # pad if no short options
436 $lpad = length($lhs) if length($lhs) > $lpad;
437 push @opt_desc, $lhs, $desc;
439 my $msg = $errmsg ? "E: $errmsg\n" : '';
446 local $Text::Wrap::columns = 78 - $lpad;
447 my $padding = ' ' x ($lpad + 2);
448 while (my ($lhs, $rhs) = splice(@opt_desc, 0, 2)) {
449 $msg .= ' '.pack("A$lpad", $lhs);
450 $rhs = wrap('', '', $rhs);
451 $rhs =~ s/\n/\n$padding/sg; # LHS pad continuation lines
455 print { $self->{$errmsg ? 2 : 1} } $msg;
456 x_it($self, $errmsg ? 1 << 8 : 0); # stderr => failure
461 my ($self, $cmd, $argv) = @_;
463 $OPT = $self->{opt} = {};
464 my $info = $CMD{$cmd} // [ '[...]' ];
465 my ($proto, undef, @spec) = @$info;
466 my $glp = ref($spec[-1]) eq ref($GLP) ? pop(@spec) : $GLP;
467 push @spec, qw(help|h);
469 if ($spec[0] =~ s/\|\z//s) { # "stdin|" or "clear|" allows "-" alias
470 $lone_dash = $spec[0];
471 $OPT->{$spec[0]} = \(my $var);
472 push @spec, '' => \$var;
474 $glp->getoptionsfromarray($argv, $OPT, @spec) or
475 return _help($self, "bad arguments or options for $cmd");
476 return _help($self) if $OPT->{help};
478 push @$argv, @{$OPT->{-argv}} if defined($OPT->{-argv});
480 # "-" aliases "stdin" or "clear"
481 $OPT->{$lone_dash} = ${$OPT->{$lone_dash}} if defined $lone_dash;
484 my $POS_ARG = '[A-Z][A-Z0-9_]+';
486 my @args = split(/ /, $proto);
487 for my $var (@args) {
488 if ($var =~ /\A$POS_ARG\.\.\.\z/o) { # >= 1 args;
489 $inf = defined($argv->[$i]) and last;
490 $var =~ s/\.\.\.\z//;
491 $err = "$var not supplied";
492 } elsif ($var =~ /\A$POS_ARG\z/o) { # required arg at $i
493 $argv->[$i++] // ($err = "$var not supplied");
494 } elsif ($var =~ /\.\.\.\]\z/) { # optional args start
497 } elsif ($var =~ /\A\[-?$POS_ARG\]\z/) { # one optional arg
499 } elsif ($var =~ /\A.+?\|/) { # required FOO|--stdin
500 my @or = split(/\|/, $var);
503 if ($o =~ /\A--([a-z0-9\-]+)/) {
504 $ok = defined($OPT->{$1});
506 } elsif (defined($argv->[$i])) {
510 } # else continue looping
514 $err = join(', ', @or) . " or $last must be set";
516 warn "BUG: can't parse `$var' in $proto";
520 if (!$inf && scalar(@$argv) > scalar(@args)) {
521 $err //= 'too many arguments';
523 $err ? fail($self, "usage: lei $cmd $proto\nE: $err") : 1;
527 my ($self, $cmd, @argv) = @_;
528 local $current_lei = $self; # for __WARN__
529 dump_and_clear_log("from previous run\n");
530 return _help($self, 'no command given') unless defined($cmd);
531 my $func = "lei_$cmd";
533 if (my $cb = __PACKAGE__->can($func)) {
534 optparse($self, $cmd, \@argv) or return;
536 } elsif (grep(/\A-/, $cmd, @argv)) { # --help or -h only
538 $GLP->getoptionsfromarray([$cmd, @argv], $opt, qw(help|h)) or
539 return _help($self, 'bad arguments or options');
542 fail($self, "`$cmd' is not an lei command");
547 my ($self, $creat) = @_;
548 my $f = _config_path($self);
550 my $cur_st = @st ? pack('dd', $st[10], $st[7]) : ''; # 10:ctime, 7:size
551 if (my $cfg = $PATH2CFG{$f}) { # reuse existing object in common case
552 return ($self->{cfg} = $cfg) if $cur_st eq $cfg->{-st};
559 my (undef, $cfg_dir, undef) = File::Spec->splitpath($f);
560 -d $cfg_dir or mkpath($cfg_dir) or die "mkpath($cfg_dir): $!\n";
561 open my $fh, '>>', $f or die "open($f): $!\n";
562 @st = stat($fh) or die "fstat($f): $!\n";
563 $cur_st = pack('dd', $st[10], $st[7]);
564 qerr($self, "I: $f created") if $self->{cmd} ne 'config';
566 my $cfg = PublicInbox::Config::git_config_dump($f);
567 $cfg->{-st} = $cur_st;
569 $self->{cfg} = $PATH2CFG{$f} = $cfg;
572 sub _lei_store ($;$) {
573 my ($self, $creat) = @_;
574 my $cfg = _lei_cfg($self, $creat);
575 $cfg->{-lei_store} //= do {
576 require PublicInbox::LeiStore;
577 my $dir = $cfg->{'leistore.dir'};
578 $dir //= $creat ? _store_path($self) : return;
579 PublicInbox::LeiStore->new($dir, { creat => $creat });
584 my ($self, @argv) = @_;
588 my ($self, @argv) = @_;
592 my ($self, @argv) = @_;
593 my $env = $self->{env};
594 delete local $env->{GIT_CONFIG};
595 delete local $ENV{GIT_CONFIG};
596 my $cfg = _lei_cfg($self, 1);
597 my $cmd = [ qw(git config -f), $cfg->{'-f'}, @argv ];
598 my %rdr = map { $_ => $self->{$_} } (0..2);
599 waitpid(spawn($cmd, $env, \%rdr), 0);
603 my ($self, @argv) = @_;
604 $self->{opt}->{'config-file'} and return fail $self,
605 "config file switches not supported by `lei config'";
607 x_it($self, $?) if $?;
611 my ($self, $dir) = @_;
612 my $cfg = _lei_cfg($self, 1);
613 my $cur = $cfg->{'leistore.dir'};
614 $dir //= _store_path($self);
615 $dir = rel2abs($self, $dir);
616 my @cur = stat($cur) if defined($cur);
617 $cur = File::Spec->canonpath($cur // $dir);
618 my @dir = stat($dir);
619 my $exists = "I: leistore.dir=$cur already initialized" if @dir;
622 _lei_store($self, 1)->done;
623 return qerr($self, $exists);
626 # some folks like symlinks and bind mounts :P
627 if (@dir && "@cur[1,0]" eq "@dir[1,0]") {
628 lei_config($self, 'leistore.dir', $dir);
629 _lei_store($self, 1)->done;
630 return qerr($self, "$exists (as $cur)");
632 return fail($self, <<"");
633 E: leistore.dir=$cur already initialized and it is not $dir
636 lei_config($self, 'leistore.dir', $dir);
637 _lei_store($self, 1)->done;
638 $exists //= "I: leistore.dir=$dir newly initialized";
639 return qerr($self, $exists);
642 sub lei_daemon_pid { puts shift, $$ }
644 sub lei_daemon_kill {
646 my $sig = $self->{opt}->{signal} // 'TERM';
647 kill($sig, $$) or fail($self, "kill($sig, $$): $!");
650 sub lei_help { _help($_[0]) }
652 # Shell completion helper. Used by lei-completion.bash and hopefully
653 # other shells. Try to do as much here as possible to avoid redundancy
654 # and improve maintainability.
656 my ($self, @argv) = @_; # argv = qw(lei and any other args...)
657 shift @argv; # ignore "lei", the entire command is sent
658 @argv or return puts $self, grep(!/^_/, keys %CMD), qw(--help -h);
659 my $cmd = shift @argv;
660 my $info = $CMD{$cmd} // do { # filter matching commands
661 @argv or puts $self, grep(/\A\Q$cmd\E/, keys %CMD);
664 my ($proto, undef, @spec) = @$info;
666 my $re = defined($cur) ? qr/\A\Q$cur\E/ : qr/./;
667 if (substr($cur // '-', 0, 1) eq '-') { # --switches
668 # gross special case since the only git-config options
669 # Consider moving to a table if we need more special cases
670 # we use Getopt::Long for are the ones we reject, so these
671 # are the ones we don't reject:
672 if ($cmd eq 'config') {
673 puts $self, grep(/$re/, keys %CONFIG_KEYS);
674 @spec = qw(add z|null get get-all unset unset-all
675 replace-all get-urlmatch
676 remove-section rename-section
677 name-only list|l edit|e
678 get-color-name get-colorbool);
681 puts $self, grep(/$re/, map { # generate short/long names
682 if (s/[:=].+\z//) { # req/optional args, e.g output|o=i
683 } else { # negation: solve! => no-solve|solve
684 s/\A(.+)!\z/no-$1|$1/;
687 my $x = length > 1 ? "--$_" : "-$_";
688 $x eq $cur ? () : $x;
689 } split(/\|/, $_, -1) # help|h
690 } grep { $OPTDESC{"$cmd\t$_"} || $OPTDESC{$_} } @spec);
691 } elsif ($cmd eq 'config' && !@argv && !$CONFIG_KEYS{$cur}) {
692 puts $self, grep(/$re/, keys %CONFIG_KEYS);
695 # switch args (e.g. lei q -f mbox<TAB>)
696 if (($argv[-1] // $cur // '') =~ /\A--?([\w\-]+)\z/) {
697 my $opt = quotemeta $1;
699 my $v = $OPTDESC{$_};
700 $v = $v->[0] if ref($v);
701 my @v = split(/\|/, $v);
702 # get rid of ALL CAPS placeholder (e.g "OUT")
703 # (TODO: completion for external paths)
704 shift(@v) if uc($v[0]) eq $v[0];
706 } grep(/\A(?:$cmd\t|)(?:[\w-]+\|)*$opt\b/, keys %OPTDESC);
709 if (my $sub = $self->can("_complete_$cmd")) {
710 puts $self, $sub->($self, @argv, $cur);
712 # TODO: URLs, pathnames, OIDs, MIDs, etc... See optparse() for
717 my ($argv, $env) = @_;
718 my $argc = scalar @$argv;
719 my $buf = 'exec '.join("\0", scalar(@$argv), @$argv);
720 while (my ($k, $v) = each %$env) { $buf .= "\0$k=$v" };
726 my $mua = $self->{opt}->{'mua-cmd'} // return;
727 my $mfolder = $self->{ovv}->{dst};
728 my (@cmd, $replaced);
729 if ($mua =~ /\A(?:mutt|mailx|mail|neomutt)\z/) {
731 # TODO: help wanted: other common FOSS MUAs
733 require Text::ParseWords;
734 my @cmd = Text::ParseWords::shellwords($mua);
735 # mutt uses '%f' for open-hook with compressed mbox, we follow
736 @cmd = map { $_ eq '%f' ? ($replaced = $mfolder) : $_ } @cmd;
738 push @cmd, $mfolder unless defined($replaced);
739 if (my $sock = $self->{sock}) { # lei(1) client process runs it
740 send($sock, exec_buf(\@cmd, {}), MSG_EOR);
742 $self->{"mua.pid.$self.$$"} = spawn(\@cmd);
746 # caller needs to "-t $self->{1}" to check if tty
749 my $env = $self->{env};
750 my $fh = popen_rd([qw(git var GIT_PAGER)], $env);
751 chomp(my $pager = <$fh> // '');
752 close($fh) or warn "`git var PAGER' error: \$?=$?";
753 return if $pager eq 'cat' || $pager eq '';
755 my $new_env = { LESS => 'FRX', LV => '-c', COLUMNS => 80 };
756 $new_env->{MORE} = 'FRX' if $^O eq 'freebsd';
757 pipe(my ($r, $wpager)) or return warn "pipe: $!";
758 my $rdr = { 0 => $r, 1 => $self->{1}, 2 => $self->{2} };
759 my $pgr = [ undef, @$rdr{1, 2}, $$ ];
760 if (my $sock = $self->{sock}) { # lei(1) process runs it
761 delete @$new_env{keys %$env}; # only set iff unset
762 my $fds = [ map { fileno($_) } @$rdr{0..2} ];
763 $send_cmd->($sock, $fds, exec_buf([$pager], $new_env), MSG_EOR);
765 $pgr->[0] = spawn([$pager], $new_env, $rdr);
767 $self->{1} = $wpager;
768 $self->{2} = $wpager if -t $self->{2};
769 $env->{GIT_PAGER_IN_USE} = 'true'; # we may spawn git
775 my $pgr = delete($self->{pgr}) or return;
776 $self->{2} = $pgr->[2];
777 # do not restore original stdout, just close it so we error out
778 close(delete($self->{1})) if $self->{1};
780 dwaitpid($pid, undef, $self->{sock}) if $pid && $pgr->[3] == $$;
783 sub accept_dispatch { # Listener {post_accept} callback
784 my ($sock) = @_; # ignore other
786 my $self = bless { sock => $sock }, __PACKAGE__;
787 vec(my $rvec = '', fileno($sock), 1) = 1;
788 select($rvec, undef, undef, 1) or
789 return send($sock, 'timed out waiting to recv FDs', MSG_EOR);
790 my @fds = $recv_cmd->($sock, my $buf, 4096 * 33); # >MAX_ARG_STRLEN
791 if (scalar(@fds) == 4) {
793 my $fd = shift(@fds);
794 open($self->{$i}, '+<&=', $fd) and next;
795 send($sock, "open(+<&=$fd) (FD=$i): $!", MSG_EOR);
798 return send($sock, "recv_cmd failed: $!", MSG_EOR);
800 $self->{2}->autoflush(1); # keep stdout buffered until x_it|DESTROY
801 # $ENV_STR = join('', map { "\0$_=$ENV{$_}" } keys %ENV);
802 # $buf = "$argc\0".join("\0", @ARGV).$ENV_STR."\0\0";
803 substr($buf, -2, 2, '') eq "\0\0" or # s/\0\0\z//
804 return send($sock, 'request command truncated', MSG_EOR);
805 my ($argc, @argv) = split(/\0/, $buf, -1);
807 my %env = map { split(/=/, $_, 2) } splice(@argv, $argc);
808 if (chdir($self->{3})) {
810 $self->{env} = \%env;
811 eval { dispatch($self, @argv) };
812 send($sock, $@, MSG_EOR) if $@;
814 send($sock, "fchdir: $!", MSG_EOR); # implicit close
820 for my $f (qw(lxs l2m)) {
821 my $wq = delete $self->{$f} or next;
824 } elsif ($wq->wq_kill_old) {
828 close(delete $self->{1}) if $self->{1}; # may reap_compress
829 $self->close if $self->{sock}; # PublicInbox::DS::close
832 # for long-running results
835 local %ENV = %{$self->{env}};
836 my $sock = $self->{sock};
837 local $current_lei = $self;
839 while (my @fds = $recv_cmd->($sock, my $buf, 4096)) {
840 if (scalar(@fds) == 1 && !defined($fds[0])) {
841 return if $! == EAGAIN;
843 last if $! == ECONNRESET;
847 open my $rfh, '+<&=', $fd;
849 die "unrecognized client signal: $buf";
854 eval { $self->fail($err) };
859 sub event_step_init {
861 if (my $sock = $self->{sock}) { # using DS->EventLoop
863 $self->SUPER::new($sock, EPOLLIN|EPOLLET);
869 our $oldset; sub oldset { $oldset }
871 sub dump_and_clear_log {
872 if (defined($errors_log) && -s STDIN && seek(STDIN, 0, SEEK_SET)) {
874 unshift(@pfx, "$errors_log ") if @pfx;
875 warn @pfx, do { local $/; <STDIN> };
876 truncate(STDIN, 0) or warn "ftruncate ($errors_log): $!";
880 # lei(1) calls this when it can't connect
882 my ($path, $errno, $narg) = @_;
883 if ($errno == ECONNREFUSED) {
884 unlink($path) or die "unlink($path): $!";
885 } elsif ($errno != ENOENT) {
886 $! = $errno; # allow interpolation to stringify in die
887 die "connect($path): $!";
889 umask(077) // die("umask(077): $!");
891 socket($listener, AF_UNIX, SOCK_SEQPACKET, 0) or die "socket: $!";
892 bind($listener, pack_sockaddr_un($path)) or die "bind($path): $!";
893 listen($listener, 1024) or die "listen: $!";
894 my @st = stat($path) or die "stat($path): $!";
895 my $dev_ino_expect = pack('dd', $st[0], $st[1]); # dev+ino
896 local $oldset = PublicInbox::DS::block_signals();
898 $send_cmd = PublicInbox::Spawn->can('send_cmd4');
899 $recv_cmd = PublicInbox::Spawn->can('recv_cmd4') // do {
900 require PublicInbox::CmdIPC4;
901 $send_cmd = PublicInbox::CmdIPC4->can('send_cmd4');
902 PublicInbox::CmdIPC4->can('recv_cmd4');
905 $recv_cmd or die <<"";
906 (Socket::MsgHdr || Inline::C) missing/unconfigured (narg=$narg);
908 require PublicInbox::Listener;
909 require PublicInbox::EOFpipe;
910 (-p STDOUT) or die "E: stdout must be a pipe\n";
912 ($errors_log) = ($path =~ m!\A(.+?/)[^/]+\z!);
913 $errors_log .= 'errors.log';
914 open(STDIN, '+>>', $errors_log) or die "open($errors_log): $!";
916 dump_and_clear_log("from previous daemon process:\n");
917 POSIX::setsid() > 0 or die "setsid: $!";
918 my $pid = fork // die "fork: $!";
920 $0 = "lei-daemon $path";
922 $listener->blocking(0);
924 my $pil = PublicInbox::Listener->new($listener, \&accept_dispatch);
926 pipe(my ($eof_r, $eof_w)) or die "pipe: $!";
927 PublicInbox::EOFpipe->new($eof_r, \&noop, undef);
929 $exit_code //= shift;
930 my $lis = $pil or exit($exit_code);
931 # closing eof_w triggers \&noop wakeup
932 $listener = $eof_w = $pil = $path = undef;
933 $lis->close; # DS::close
934 PublicInbox::DS->SetLoopTimeout(1000);
938 CHLD => \&PublicInbox::DS::enqueue_reap,
946 my $sigfd = PublicInbox::Sigfd->new($sig, SFD_NONBLOCK);
947 local @SIG{keys %$sig} = values(%$sig) unless $sigfd;
949 local $SIG{PIPE} = 'IGNORE';
950 if ($sigfd) { # TODO: use inotify/kqueue to detect unlinked sockets
952 PublicInbox::DS->SetLoopTimeout(5000);
954 # wake up every second to accept signals if we don't
955 # have signalfd or IO::KQueue:
956 PublicInbox::DS::sig_setmask($oldset);
957 PublicInbox::DS->SetLoopTimeout(1000);
959 PublicInbox::DS->SetPostLoopCallback(sub {
960 my ($dmap, undef) = @_;
961 if (@st = defined($path) ? stat($path) : ()) {
962 if ($dev_ino_expect ne pack('dd', $st[0], $st[1])) {
963 warn "$path dev/ino changed, quitting\n";
966 } elsif (defined($path)) {
967 warn "stat($path): $!, quitting ...\n";
968 undef $path; # don't unlink
971 return 1 if defined($path);
974 for my $s (values %$dmap) {
975 $s->can('busy') or next;
976 if ($s->busy($now)) {
982 $n; # true: continue, false: stop
985 # STDIN was redirected to /dev/null above, closing STDERR and
986 # STDOUT will cause the calling `lei' client process to finish
987 # reading the <$daemon> pipe.
988 openlog($path, 'pid', 'user');
989 local $SIG{__WARN__} = sub {
990 $current_lei ? err($current_lei, @_) : syslog('warning', "@_");
992 my $on_destroy = PublicInbox::OnDestroy->new($$, sub {
993 syslog('crit', "$@") if $@;
995 open STDERR, '>&STDIN' or die "redirect stderr failed: $!";
996 open STDOUT, '>&STDIN' or die "redirect stdout failed: $!";
997 # $daemon pipe to `lei' closed, main loop begins:
998 PublicInbox::DS->EventLoop;
999 @$on_destroy = (); # cancel on_destroy if we get here
1000 exit($exit_code // 0);
1003 # for users w/o Socket::Msghdr installed or Inline::C enabled
1005 my ($main_pkg) = @_;
1006 my $exit = $main_pkg->can('exit'); # caller may override exit()
1007 local $quit = $exit if $exit;
1009 umask(077) // die("umask(077): $!");
1016 dispatch($self, @ARGV);
1017 x_it($self, $self->{child_error}) if $self->{child_error};
1020 # ensures stdout hits the FS before sock disconnects so a client
1021 # can immediately reread it
1024 $self->{1}->autoflush(1) if $self->{1};
1026 if (my $mua_pid = delete $self->{"mua.pid.$self.$$"}) {
1027 waitpid($mua_pid, 0);