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 Sys::Syslog qw(syslog openlog);
19 use PublicInbox::Config;
20 use PublicInbox::Syscall qw(SFD_NONBLOCK EPOLLIN EPOLLET);
21 use PublicInbox::Sigfd;
22 use PublicInbox::DS qw(now dwaitpid);
23 use PublicInbox::Spawn qw(spawn run_die popen_rd);
24 use PublicInbox::OnDestroy;
25 use Text::Wrap qw(wrap);
26 use File::Path qw(mkpath);
28 our $quit = \&CORE::exit;
30 my ($recv_cmd, $send_cmd);
31 my $GLP = Getopt::Long::Parser->new;
32 $GLP->configure(qw(gnu_getopt no_ignore_case auto_abbrev));
33 my $GLP_PASS = Getopt::Long::Parser->new;
34 $GLP_PASS->configure(qw(gnu_getopt no_ignore_case auto_abbrev pass_through));
36 our %PATH2CFG; # persistent for socket daemon
37 our @TO_CLOSE_ATFORK_CHILD;
39 # TBD: this is a documentation mechanism to show a subcommand
40 # (may) pass options through to another command:
41 sub pass_through { $GLP_PASS }
45 my ($spec, $re_str) = @_; # 'limit|n=i', '([0-9]+)'
46 my ($key) = ($spec =~ m/\A([a-z]+)/g);
47 my $cb = sub { # Getopt::Long "<>" catch-all handler
49 if ($arg =~ /\A-($re_str)\z/) {
51 } elsif ($arg eq '--') { # "--" arg separator, ignore first
52 push @{$OPT->{-argv}}, $arg if $OPT->{'--'}++;
53 # lone (single) dash is handled elsewhere
54 } elsif (substr($arg, 0, 1) eq '-') {
56 push @{$OPT->{-argv}}, $arg;
58 die "bad argument: $arg\n";
61 push @{$OPT->{-argv}}, $arg;
64 ($spec, '<>' => $cb, $GLP_PASS) # for Getopt::Long
69 File::Spec->rel2abs(($env->{XDG_DATA_HOME} //
70 ($env->{HOME} // '/nonexistent').'/.local/share')
71 .'/lei/store', $env->{PWD});
74 sub _config_path ($) {
76 File::Spec->rel2abs(($env->{XDG_CONFIG_HOME} //
77 ($env->{HOME} // '/nonexistent').'/.config')
78 .'/lei/config', $env->{PWD});
81 # TODO: generate shell completion + help using %CMD and %OPTDESC
82 # command => [ positional_args, 1-line description, Getopt::Long option spec ]
83 our %CMD = ( # sorted in order of importance/use:
84 'q' => [ 'SEARCH_TERMS...', 'search for messages matching terms', qw(
85 save-as=s output|mfolder|o=s format|f=s dedupe|d=s thread|t augment|a
86 sort|s=s reverse|r offset=i remote local! external! pretty
87 since|after=s until|before=s), opt_dash('limit|n=i', '[0-9]+') ],
89 'show' => [ 'MID|OID', 'show a given object (Message-ID or object ID)',
90 qw(type=s solve! format|f=s dedupe|d=s thread|t remote local!),
91 pass_through('git show') ],
93 'add-external' => [ 'URL_OR_PATHNAME',
94 'add/set priority of a publicinbox|extindex for extra matches',
95 qw(boost=i quiet|q) ],
96 'ls-external' => [ '[FILTER...]', 'list publicinbox|extindex locations',
97 qw(format|f=s z|0 local remote quiet|q) ],
98 'forget-external' => [ '{URL_OR_PATHNAME|--prune}',
99 'exclude further results from a publicinbox|extindex',
102 'ls-query' => [ '[FILTER...]', 'list saved search queries',
103 qw(name-only format|f=s z) ],
104 'rm-query' => [ 'QUERY_NAME', 'remove a saved search' ],
105 'mv-query' => [ qw(OLD_NAME NEW_NAME), 'rename a saved search' ],
107 'plonk' => [ '--thread|--from=IDENT',
108 'exclude mail matching From: or thread from non-Message-ID searches',
109 qw(stdin| thread|t from|f=s mid=s oid=s) ],
110 'mark' => [ 'MESSAGE_FLAGS...',
111 'set/unset flags on message(s) from stdin',
112 qw(stdin| oid=s exact by-mid|mid:s) ],
113 'forget' => [ '[--stdin|--oid=OID|--by-mid=MID]',
114 "exclude message(s) on stdin from `q' search results",
115 qw(stdin| oid=s exact by-mid|mid:s quiet|q) ],
117 'purge-mailsource' => [ '{URL_OR_PATHNAME|--all}',
118 'remove imported messages from IMAP, Maildirs, and MH',
119 qw(exact! all jobs:i indexed) ],
121 # code repos are used for `show' to solve blobs from patch mails
122 'add-coderepo' => [ 'PATHNAME', 'add or set priority of a git code repo',
124 'ls-coderepo' => [ '[FILTER_TERMS...]',
125 'list known code repos', qw(format|f=s z) ],
126 'forget-coderepo' => [ 'PATHNAME',
127 'stop using repo to solve blobs from patches',
130 'add-watch' => [ '[URL_OR_PATHNAME]',
131 'watch for new messages and flag changes',
132 qw(import! flags! interval=s recursive|r exclude=s include=s) ],
133 'ls-watch' => [ '[FILTER...]', 'list active watches with numbers and status',
135 'pause-watch' => [ '[WATCH_NUMBER_OR_FILTER]', qw(all local remote) ],
136 'resume-watch' => [ '[WATCH_NUMBER_OR_FILTER]', qw(all local remote) ],
137 'forget-watch' => [ '{WATCH_NUMBER|--prune}', 'stop and forget a watch',
140 'import' => [ '{URL_OR_PATHNAME|--stdin}',
141 'one-shot import/update from URL or filesystem',
142 qw(stdin| offset=i recursive|r exclude=s include=s !flags),
145 'config' => [ '[...]', sub {
146 'git-config(1) wrapper for '._config_path($_[0]);
147 }, qw(config-file|system|global|file|f=s), # for conflict detection
148 pass_through('git config') ],
149 'init' => [ '[PATHNAME]', sub {
150 'initialize storage, default: '._store_path($_[0]);
152 'daemon-kill' => [ '[-SIGNAL]', 'signal the lei-daemon',
153 opt_dash('signal|s=s', '[0-9]+|(?:[A-Z][A-Z0-9]+)') ],
154 'daemon-pid' => [ '', 'show the PID of the lei-daemon' ],
155 'help' => [ '[SUBCOMMAND]', 'show help' ],
157 # XXX do we need this?
158 # 'git' => [ '[ANYTHING...]', 'git(1) wrapper', pass_through('git') ],
160 'reorder-local-store-and-break-history' => [ '[REFNAME]',
161 'rewrite git history in an attempt to improve compression',
164 # internal commands are prefixed with '_'
165 '_complete' => [ '[...]', 'internal shell completion helper',
166 pass_through('everything') ],
169 # switch descriptions, try to keep consistent across commands
170 # $spec: Getopt::Long option specification
171 # $spec => [@ALLOWED_VALUES (default is first), $description],
172 # $spec => $description
173 # "$SUB_COMMAND TAB $spec" => as above
174 my $stdin_formats = [ 'IN|auto|raw|mboxrd|mboxcl2|mboxcl|mboxo',
175 'specify message input format' ];
176 my $ls_format = [ 'OUT|plain|json|null', 'listing output format' ];
179 'help|h' => 'show this built-in help',
180 'quiet|q' => 'be quiet',
181 'solve!' => 'do not attempt to reconstruct blobs from emails',
182 'save-as=s' => ['NAME', 'save a search terms by given name'],
184 'type=s' => [ 'any|mid|git', 'disambiguate type' ],
186 'dedupe|d=s' => ['STRAT|content|oid|mid|none',
187 'deduplication strategy'],
188 'show thread|t' => 'display entire thread a message belongs to',
190 'return all messages in the same thread as the actual match(es)',
191 'augment|a' => 'augment --output destination instead of clobbering',
193 'output|o=s' => [ 'DEST',
194 "destination (e.g. `/path/to/Maildir', or `-' for stdout)" ],
196 'show format|f=s' => [ 'OUT|plain|raw|html|mboxrd|mboxcl2|mboxcl',
197 'message/object output format' ],
198 'mark format|f=s' => $stdin_formats,
199 'forget format|f=s' => $stdin_formats,
200 'q format|f=s' => [ 'OUT|maildir|mboxrd|mboxcl2|mboxcl|html|oid|json',
201 'specify output format, default depends on --output'],
202 'ls-query format|f=s' => $ls_format,
203 'ls-external format|f=s' => $ls_format,
205 'limit|n=i@' => ['NUM', 'limit on number of matches (default: 10000)' ],
206 'offset=i' => ['OFF', 'search result offset (default: 0)'],
208 'sort|s=s' => [ 'VAL|received,relevance,docid',
209 "order of results `--output'-dependent"],
210 'reverse|r' => [ 'reverse search results' ], # like sort(1)
212 'boost=i' => 'increase/decrease priority of results (default: 0)',
214 'local' => 'limit operations to the local filesystem',
215 'local!' => 'exclude results from the local filesystem',
216 'remote' => 'limit operations to those requiring network access',
217 'remote!' => 'prevent operations requiring network access',
219 'mid=s' => 'specify the Message-ID of a message',
220 'oid=s' => 'specify the git object ID of a message',
222 'recursive|r' => 'scan directories/mailboxes/newsgroups recursively',
223 'exclude=s' => 'exclude mailboxes/newsgroups based on pattern',
224 'include=s' => 'include mailboxes/newsgroups based on pattern',
226 'exact' => 'operate on exact header matches only',
227 'exact!' => 'rely on content match instead of exact header matches',
229 'by-mid|mid:s' => [ 'MID', 'match only by Message-ID, ignoring contents' ],
230 'jobs:i' => 'set parallelism level',
232 # xargs, env, use "-0", git(1) uses "-z". We support z|0 everywhere
233 'z|0' => 'use NUL \\0 instead of newline (CR) to delimit lines',
235 'signal|s=s' => [ 'SIG', 'signal to send lei-daemon (default: TERM)' ],
239 'leistore.dir' => 'top-level storage location',
242 # pronounced "exit": x_it(1 << 8) => exit(1); x_it(13) => SIGPIPE
244 my ($self, $code) = @_;
245 # make sure client sees stdout before exit
246 $self->{1}->autoflush(1) if $self->{1};
247 if (my $sock = $self->{sock}) {
248 send($sock, "x_it $code", MSG_EOR);
249 } elsif (!($code & 127)) { # oneshot, ignore signals
254 sub puts ($;@) { print { shift->{1} } map { "$_\n" } @_ }
256 sub out ($;@) { print { shift->{1} } @_ }
259 print { shift->{2} } @_, (substr($_[-1], -1, 1) eq "\n" ? () : "\n");
262 sub qerr ($;@) { $_[0]->{opt}->{quiet} or err(shift, @_) }
265 my ($self, $buf, $exit_code) = @_;
267 x_it($self, ($exit_code // 1) << 8);
271 sub atfork_prepare_wq {
272 my ($self, $wq) = @_;
273 push @{$wq->{-ipc_atfork_child_close}}, @TO_CLOSE_ATFORK_CHILD,
274 grep { defined } @$self{qw(0 1 2 sock)}
277 # usage: my %sig = $lei->atfork_child_wq($wq);
278 # local @SIG{keys %sig} = values %sig;
279 sub atfork_child_wq {
280 my ($self, $wq) = @_;
281 @$self{qw(0 1 2 sock)} = delete(@$wq{0..3});
283 $quit = \&CORE::exit;
284 @TO_CLOSE_ATFORK_CHILD = ();
285 (__WARN__ => sub { err($self, @_) },
287 $self->x_it(13); # SIGPIPE = 13
288 # we need to close explicitly to avoid Perl warning on SIGPIPE
289 close($_) for (delete @$self{1..2});
290 die bless(\"$_[0]", 'PublicInbox::SIGPIPE'),
294 # usage: ($lei, @io) = $lei->atfork_parent_wq($wq);
295 sub atfork_parent_wq {
296 my ($self, $wq) = @_;
297 if ($wq->wq_workers) {
298 my $env = delete $self->{env}; # env is inherited at fork
299 my $ret = bless { %$self }, ref($self);
301 delete @$ret{qw(-lei_store cfg pgr)};
302 ($ret, delete @$ret{0..2}, delete($ret->{sock}) // ());
304 ($self, @$self{0..2}, $self->{sock} // ());
309 my ($self, $errmsg) = @_;
310 my $cmd = $self->{cmd} // 'COMMAND';
311 my @info = @{$CMD{$cmd} // [ '...', '...' ]};
312 my @top = ($cmd, shift(@info) // ());
313 my $cmd_desc = shift(@info);
314 $cmd_desc = $cmd_desc->($self->{env}) if ref($cmd_desc) eq 'CODE';
317 for my $sw (grep { !ref } @info) { # ("prio=s", "z", $GLP_PASS)
318 my $desc = $OPTDESC{"$cmd\t$sw"} // $OPTDESC{$sw} // next;
320 ($arg_vals, $desc) = @$desc if ref($desc) eq 'ARRAY';
322 # lower-case is a keyword (e.g. `content', `oid'),
323 # ALL_CAPS is a string description (e.g. `PATH')
324 if ($desc !~ /default/ && $arg_vals =~ /\b([a-z]+)[,\|]/) {
325 $desc .= "\ndefault: `$1'";
329 if ($x =~ s/!\z//) { # solve! => --no-solve
331 } elsif ($x =~ s/:.+//) { # optional args: $x = "mid:s"
332 @vals = (' [', undef, ']');
333 } elsif ($x =~ s/=.+//) { # required arg: $x = "type=s"
334 @vals = (' ', undef);
335 } # else: no args $x = 'thread|t'
336 for (split(/\|/, $x)) { # help|h
337 length($_) > 1 ? push(@l, "--$_") : push(@s, "-$_");
339 if (!scalar(@vals)) { # no args 'thread|t'
340 } elsif ($arg_vals =~ s/\A([A-Z_]+)\b//) { # "NAME"
343 $vals[1] = uc(substr($l[0], 2)); # "--type" => "TYPE"
345 if ($arg_vals =~ /([,\|])/) {
347 my @allow = split(/\Q$sep\E/, $arg_vals);
348 my $must = $sep eq '|' ? 'Must' : 'Can';
349 @allow = map { "`$_'" } @allow;
350 my $last = pop @allow;
351 $desc .= "\n$must be one of: " .
352 join(', ', @allow) . " or $last";
354 my $lhs = join(', ', @s, @l) . join('', @vals);
355 if ($x =~ /\|\z/) { # "stdin|" or "clear|"
356 $lhs =~ s/\A--/- , --/;
358 $lhs =~ s/\A--/ --/; # pad if no short options
360 $lpad = length($lhs) if length($lhs) > $lpad;
361 push @opt_desc, $lhs, $desc;
363 my $msg = $errmsg ? "E: $errmsg\n" : '';
370 local $Text::Wrap::columns = 78 - $lpad;
371 my $padding = ' ' x ($lpad + 2);
372 while (my ($lhs, $rhs) = splice(@opt_desc, 0, 2)) {
373 $msg .= ' '.pack("A$lpad", $lhs);
374 $rhs = wrap('', '', $rhs);
375 $rhs =~ s/\n/\n$padding/sg; # LHS pad continuation lines
379 print { $self->{$errmsg ? 2 : 1} } $msg;
380 x_it($self, $errmsg ? 1 << 8 : 0); # stderr => failure
385 my ($self, $cmd, $argv) = @_;
387 $OPT = $self->{opt} = {};
388 my $info = $CMD{$cmd} // [ '[...]' ];
389 my ($proto, undef, @spec) = @$info;
390 my $glp = ref($spec[-1]) eq ref($GLP) ? pop(@spec) : $GLP;
391 push @spec, qw(help|h);
393 if ($spec[0] =~ s/\|\z//s) { # "stdin|" or "clear|" allows "-" alias
394 $lone_dash = $spec[0];
395 $OPT->{$spec[0]} = \(my $var);
396 push @spec, '' => \$var;
398 $glp->getoptionsfromarray($argv, $OPT, @spec) or
399 return _help($self, "bad arguments or options for $cmd");
400 return _help($self) if $OPT->{help};
402 push @$argv, @{$OPT->{-argv}} if defined($OPT->{-argv});
404 # "-" aliases "stdin" or "clear"
405 $OPT->{$lone_dash} = ${$OPT->{$lone_dash}} if defined $lone_dash;
408 my $POS_ARG = '[A-Z][A-Z0-9_]+';
410 my @args = split(/ /, $proto);
411 for my $var (@args) {
412 if ($var =~ /\A$POS_ARG\.\.\.\z/o) { # >= 1 args;
413 $inf = defined($argv->[$i]) and last;
414 $var =~ s/\.\.\.\z//;
415 $err = "$var not supplied";
416 } elsif ($var =~ /\A$POS_ARG\z/o) { # required arg at $i
417 $argv->[$i++] // ($err = "$var not supplied");
418 } elsif ($var =~ /\.\.\.\]\z/) { # optional args start
421 } elsif ($var =~ /\A\[-?$POS_ARG\]\z/) { # one optional arg
423 } elsif ($var =~ /\A.+?\|/) { # required FOO|--stdin
424 my @or = split(/\|/, $var);
427 if ($o =~ /\A--([a-z0-9\-]+)/) {
428 $ok = defined($OPT->{$1});
430 } elsif (defined($argv->[$i])) {
434 } # else continue looping
437 $err = join(', ', @or) . " or $last must be set";
439 warn "BUG: can't parse `$var' in $proto";
443 if (!$inf && scalar(@$argv) > scalar(@args)) {
444 $err //= 'too many arguments';
446 $err ? fail($self, "usage: lei $cmd $proto\nE: $err") : 1;
450 my ($self, $cmd, @argv) = @_;
451 local $current_lei = $self; # for __WARN__
452 return _help($self, 'no command given') unless defined($cmd);
453 my $func = "lei_$cmd";
455 if (my $cb = __PACKAGE__->can($func)) {
456 optparse($self, $cmd, \@argv) or return;
458 } elsif (grep(/\A-/, $cmd, @argv)) { # --help or -h only
460 $GLP->getoptionsfromarray([$cmd, @argv], $opt, qw(help|h)) or
461 return _help($self, 'bad arguments or options');
464 fail($self, "`$cmd' is not an lei command");
469 my ($self, $creat) = @_;
470 my $f = _config_path($self->{env});
472 my $cur_st = @st ? pack('dd', $st[10], $st[7]) : ''; # 10:ctime, 7:size
473 if (my $cfg = $PATH2CFG{$f}) { # reuse existing object in common case
474 return ($self->{cfg} = $cfg) if $cur_st eq $cfg->{-st};
481 my (undef, $cfg_dir, undef) = File::Spec->splitpath($f);
482 -d $cfg_dir or mkpath($cfg_dir) or die "mkpath($cfg_dir): $!\n";
483 open my $fh, '>>', $f or die "open($f): $!\n";
484 @st = stat($fh) or die "fstat($f): $!\n";
485 $cur_st = pack('dd', $st[10], $st[7]);
486 qerr($self, "I: $f created") if $self->{cmd} ne 'config';
488 my $cfg = PublicInbox::Config::git_config_dump($f);
489 $cfg->{-st} = $cur_st;
491 $self->{cfg} = $PATH2CFG{$f} = $cfg;
494 sub _lei_store ($;$) {
495 my ($self, $creat) = @_;
496 my $cfg = _lei_cfg($self, $creat);
497 $cfg->{-lei_store} //= do {
498 require PublicInbox::LeiStore;
499 my $dir = $cfg->{'leistore.dir'};
500 $dir //= _store_path($self->{env}) if $creat;
502 PublicInbox::LeiStore->new($dir, { creat => $creat });
507 my ($self, @argv) = @_;
511 my ($self, @argv) = @_;
515 my ($self, @argv) = @_;
516 $self->{opt}->{'config-file'} and return fail $self,
517 "config file switches not supported by `lei config'";
518 my $env = $self->{env};
519 delete local $env->{GIT_CONFIG};
520 my $cfg = _lei_cfg($self, 1);
521 my $cmd = [ qw(git config -f), $cfg->{'-f'}, @argv ];
522 my %rdr = map { $_ => $self->{$_} } (0..2);
523 run_die($cmd, $env, \%rdr);
527 my ($self, $dir) = @_;
528 my $cfg = _lei_cfg($self, 1);
529 my $cur = $cfg->{'leistore.dir'};
530 my $env = $self->{env};
531 $dir //= _store_path($env);
532 $dir = File::Spec->rel2abs($dir, $env->{PWD}); # PWD is symlink-aware
533 my @cur = stat($cur) if defined($cur);
534 $cur = File::Spec->canonpath($cur // $dir);
535 my @dir = stat($dir);
536 my $exists = "I: leistore.dir=$cur already initialized" if @dir;
539 _lei_store($self, 1)->done;
540 return qerr($self, $exists);
543 # some folks like symlinks and bind mounts :P
544 if (@dir && "$cur[0] $cur[1]" eq "$dir[0] $dir[1]") {
545 lei_config($self, 'leistore.dir', $dir);
546 _lei_store($self, 1)->done;
547 return qerr($self, "$exists (as $cur)");
549 return fail($self, <<"");
550 E: leistore.dir=$cur already initialized and it is not $dir
553 lei_config($self, 'leistore.dir', $dir);
554 _lei_store($self, 1)->done;
555 $exists //= "I: leistore.dir=$dir newly initialized";
556 return qerr($self, $exists);
559 sub lei_daemon_pid { puts shift, $$ }
561 sub lei_daemon_kill {
563 my $sig = $self->{opt}->{signal} // 'TERM';
564 kill($sig, $$) or fail($self, "kill($sig, $$): $!");
567 sub lei_help { _help($_[0]) }
569 # Shell completion helper. Used by lei-completion.bash and hopefully
570 # other shells. Try to do as much here as possible to avoid redundancy
571 # and improve maintainability.
573 my ($self, @argv) = @_; # argv = qw(lei and any other args...)
574 shift @argv; # ignore "lei", the entire command is sent
575 @argv or return puts $self, grep(!/^_/, keys %CMD), qw(--help -h);
576 my $cmd = shift @argv;
577 my $info = $CMD{$cmd} // do { # filter matching commands
578 @argv or puts $self, grep(/\A\Q$cmd\E/, keys %CMD);
581 my ($proto, undef, @spec) = @$info;
583 my $re = defined($cur) ? qr/\A\Q$cur\E/ : qr/./;
584 if (substr($cur // '-', 0, 1) eq '-') { # --switches
585 # gross special case since the only git-config options
586 # Consider moving to a table if we need more special cases
587 # we use Getopt::Long for are the ones we reject, so these
588 # are the ones we don't reject:
589 if ($cmd eq 'config') {
590 puts $self, grep(/$re/, keys %CONFIG_KEYS);
591 @spec = qw(add z|null get get-all unset unset-all
592 replace-all get-urlmatch
593 remove-section rename-section
594 name-only list|l edit|e
595 get-color-name get-colorbool);
599 puts $self, grep(/$re/, map { # generate short/long names
601 if (s/=.+\z//) { # required arg, e.g. output|o=i
603 } elsif (s/:.+\z//) { # optional arg, e.g. mid:s
604 } else { # negation: solve! => no-solve|solve
605 s/\A(.+)!\z/no-$1|$1/;
608 length > 1 ? "--$_$eq" : "-$_"
609 } split(/\|/, $_, -1) # help|h
610 } grep { $OPTDESC{"$cmd\t$_"} || $OPTDESC{$_} } @spec);
611 } elsif ($cmd eq 'config' && !@argv && !$CONFIG_KEYS{$cur}) {
612 puts $self, grep(/$re/, keys %CONFIG_KEYS);
614 # TODO: URLs, pathnames, OIDs, MIDs, etc... See optparse() for
618 sub reap_exec { # dwaitpid callback
619 my ($self, $pid) = @_;
623 sub lei_git { # support passing through random git commands
624 my ($self, @argv) = @_;
625 my %rdr = map { $_ => $self->{$_} } (0..2);
626 my $pid = spawn(['git', @argv], $self->{env}, \%rdr);
627 dwaitpid($pid, \&reap_exec, $self);
630 # caller needs to "-t $self->{1}" to check if tty
633 my $env = $self->{env};
634 my $fh = popen_rd([qw(git var GIT_PAGER)], $env);
635 chomp(my $pager = <$fh> // '');
636 close($fh) or warn "`git var PAGER' error: \$?=$?";
637 return if $pager eq 'cat' || $pager eq '';
639 my %new_env = (LESS => 'FRX', LV => '-c', COLUMNS => 80);
640 $new_env{MORE} = 'FRX' if $^O eq 'freebsd';
641 pipe(my ($r, $wpager)) or return warn "pipe: $!";
642 my $rdr = { 0 => $r, 1 => $self->{1}, 2 => $self->{2} };
643 my $pgr = [ undef, @$rdr{1, 2} ];
644 if (my $sock = $self->{sock}) { # lei(1) process runs it
645 delete @new_env{keys %$env}; # only set iff unset
646 my $buf = "exec 1\0".$pager;
647 while (my ($k, $v) = each %new_env) { $buf .= "\0$k=$v" };
648 my $fds = [ map { fileno($_) } @$rdr{0..2} ];
649 $send_cmd->($sock, $fds, $buf, MSG_EOR);
651 $pgr->[0] = spawn([$pager], $env, $rdr);
653 $self->{1} = $wpager;
654 $self->{2} = $wpager if -t $self->{2};
655 $env->{GIT_PAGER_IN_USE} = 'true'; # we may spawn git
661 my $pgr = delete($self->{pgr}) or return;
662 $self->{2} = $pgr->[2];
663 # do not restore original stdout, just close it so we error out
664 close(delete($self->{1})) if $self->{1};
666 dwaitpid($pid, undef, $self->{sock}) if $pid;
669 sub accept_dispatch { # Listener {post_accept} callback
670 my ($sock) = @_; # ignore other
672 my $self = bless { sock => $sock }, __PACKAGE__;
673 vec(my $rvec = '', fileno($sock), 1) = 1;
674 select($rvec, undef, undef, 1) or
675 return send($sock, 'timed out waiting to recv FDs', MSG_EOR);
676 my @fds = $recv_cmd->($sock, my $buf, 4096 * 33); # >MAX_ARG_STRLEN
677 if (scalar(@fds) == 4) {
679 for my $rdr (qw(<&= >&= >&= <&=)) {
680 my $fd = shift(@fds);
681 open($self->{$i++}, $rdr, $fd) and next;
682 send($sock, "open($rdr$fd) (FD=$i): $!", MSG_EOR);
685 return send($sock, "recv_cmd failed: $!", MSG_EOR);
687 $self->{2}->autoflush(1); # keep stdout buffered until x_it|DESTROY
688 # $ENV_STR = join('', map { "\0$_=$ENV{$_}" } keys %ENV);
689 # $buf = "$$\0$argc\0".join("\0", @ARGV).$ENV_STR."\0\0";
690 substr($buf, -2, 2, '') eq "\0\0" or # s/\0\0\z//
691 return send($sock, 'request command truncated', MSG_EOR);
692 my ($argc, @argv) = split(/\0/, $buf, -1);
694 my %env = map { split(/=/, $_, 2) } splice(@argv, $argc);
695 if (chdir(delete($self->{3}))) {
697 $self->{env} = \%env;
698 eval { dispatch($self, @argv) };
699 send($sock, $@, MSG_EOR) if $@;
701 send($sock, "fchdir: $!", MSG_EOR); # implicit close
707 delete $self->{lxs}; # stops LeiXSearch queries
708 $self->close; # PublicInbox::DS::close
711 # for long-running results
714 local %ENV = %{$self->{env}};
715 my $sock = $self->{sock};
717 while (my @fds = $recv_cmd->($sock, my $buf, 4096)) {
718 if (scalar(@fds) == 1 && !defined($fds[0])) {
719 return if $! == EAGAIN;
721 last if $! == ECONNRESET;
725 open my $rfh, '+<&=', $fd;
727 die "unrecognized client signal: $buf";
732 eval { $self->fail($err) };
737 sub event_step_init {
739 $self->{sock}->blocking(0);
740 $self->SUPER::new($self->{sock}, EPOLLIN|EPOLLET);
745 our $oldset; sub oldset { $oldset }
747 # lei(1) calls this when it can't connect
749 my ($path, $errno, $narg) = @_;
750 if ($errno == ECONNREFUSED) {
751 unlink($path) or die "unlink($path): $!";
752 } elsif ($errno != ENOENT) {
753 $! = $errno; # allow interpolation to stringify in die
754 die "connect($path): $!";
756 umask(077) // die("umask(077): $!");
757 socket(my $l, AF_UNIX, SOCK_SEQPACKET, 0) or die "socket: $!";
758 bind($l, pack_sockaddr_un($path)) or die "bind($path): $!";
759 listen($l, 1024) or die "listen: $!";
760 my @st = stat($path) or die "stat($path): $!";
761 my $dev_ino_expect = pack('dd', $st[0], $st[1]); # dev+ino
762 pipe(my ($eof_r, $eof_w)) or die "pipe: $!";
763 local $oldset = PublicInbox::DS::block_signals();
765 $send_cmd = PublicInbox::Spawn->can('send_cmd4');
766 $recv_cmd = PublicInbox::Spawn->can('recv_cmd4') // do {
767 require PublicInbox::CmdIPC4;
768 $send_cmd = PublicInbox::CmdIPC4->can('send_cmd4');
769 PublicInbox::CmdIPC4->can('recv_cmd4');
772 $recv_cmd or die <<"";
773 (Socket::MsgHdr || Inline::C) missing/unconfigured (narg=$narg);
775 require PublicInbox::Listener;
776 require PublicInbox::EOFpipe;
777 (-p STDOUT) or die "E: stdout must be a pipe\n";
778 open(STDIN, '+<', '/dev/null') or die "redirect stdin failed: $!";
779 POSIX::setsid() > 0 or die "setsid: $!";
780 my $pid = fork // die "fork: $!";
782 $0 = "lei-daemon $path";
784 local @TO_CLOSE_ATFORK_CHILD = ($l, $eof_w);
786 $l = PublicInbox::Listener->new($l, \&accept_dispatch, $l);
789 $exit_code //= shift;
790 my $listener = $l or exit($exit_code);
791 # closing eof_w triggers \&noop wakeup
792 $eof_w = $l = $path = undef;
793 $listener->close; # DS::close
794 PublicInbox::DS->SetLoopTimeout(1000);
796 PublicInbox::EOFpipe->new($eof_r, \&noop, undef);
799 CHLD => \&PublicInbox::DS::enqueue_reap,
807 my $sigfd = PublicInbox::Sigfd->new($sig, SFD_NONBLOCK);
808 local @SIG{keys %$sig} = values(%$sig) unless $sigfd;
810 local $SIG{PIPE} = 'IGNORE';
811 if ($sigfd) { # TODO: use inotify/kqueue to detect unlinked sockets
813 PublicInbox::DS->SetLoopTimeout(5000);
815 # wake up every second to accept signals if we don't
816 # have signalfd or IO::KQueue:
817 PublicInbox::DS::sig_setmask($oldset);
818 PublicInbox::DS->SetLoopTimeout(1000);
820 PublicInbox::DS->SetPostLoopCallback(sub {
821 my ($dmap, undef) = @_;
822 if (@st = defined($path) ? stat($path) : ()) {
823 if ($dev_ino_expect ne pack('dd', $st[0], $st[1])) {
824 warn "$path dev/ino changed, quitting\n";
827 } elsif (defined($path)) {
828 warn "stat($path): $!, quitting ...\n";
829 undef $path; # don't unlink
832 return 1 if defined($path);
835 for my $s (values %$dmap) {
836 $s->can('busy') or next;
837 if ($s->busy($now)) {
843 $n; # true: continue, false: stop
846 # STDIN was redirected to /dev/null above, closing STDERR and
847 # STDOUT will cause the calling `lei' client process to finish
848 # reading the <$daemon> pipe.
849 openlog($path, 'pid', 'user');
850 local $SIG{__WARN__} = sub {
851 $current_lei ? err($current_lei, @_) : syslog('warning', "@_");
853 my $on_destroy = PublicInbox::OnDestroy->new($$, sub {
854 syslog('crit', "$@") if $@;
856 open STDERR, '>&STDIN' or die "redirect stderr failed: $!";
857 open STDOUT, '>&STDIN' or die "redirect stdout failed: $!";
858 # $daemon pipe to `lei' closed, main loop begins:
859 PublicInbox::DS->EventLoop;
860 @$on_destroy = (); # cancel on_destroy if we get here
861 exit($exit_code // 0);
864 # for users w/o Socket::Msghdr
867 my $exit = $main_pkg->can('exit'); # caller may override exit()
868 local $quit = $exit if $exit;
870 umask(077) // die("umask(077): $!");
876 }, __PACKAGE__), @ARGV);
879 # ensures stdout hits the FS before sock disconnects so a client
880 # can immediately reread it
883 $self->{1}->autoflush(1) if $self->{1};