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Diffstat (limited to 'lib/PublicInbox/LEI.pm')
| -rw-r--r-- | lib/PublicInbox/LEI.pm | 692 |
1 files changed, 692 insertions, 0 deletions
diff --git a/lib/PublicInbox/LEI.pm b/lib/PublicInbox/LEI.pm new file mode 100644 index 00000000..b5ba1f71 --- /dev/null +++ b/lib/PublicInbox/LEI.pm @@ -0,0 +1,692 @@ +# Copyright (C) 2020 all contributors <meta@public-inbox.org> +# License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt> + +# Backend for `lei' (local email interface). Unlike the C10K-oriented +# PublicInbox::Daemon, this is designed exclusively to handle trusted +# local clients with read/write access to the FS and use as many +# system resources as the local user has access to. +package PublicInbox::LEI; +use strict; +use v5.10.1; +use parent qw(PublicInbox::DS); +use Getopt::Long (); +use Errno qw(EAGAIN ECONNREFUSED ENOENT); +use POSIX qw(setsid); +use IO::Socket::UNIX; +use IO::Handle (); +use Sys::Syslog qw(syslog openlog); +use PublicInbox::Config; +use PublicInbox::Syscall qw($SFD_NONBLOCK EPOLLIN EPOLLONESHOT); +use PublicInbox::Sigfd; +use PublicInbox::DS qw(now); +use PublicInbox::Spawn qw(spawn); +use Text::Wrap qw(wrap); +use File::Path qw(mkpath); +use File::Spec; +our $quit = \&CORE::exit; +my $glp = Getopt::Long::Parser->new; +$glp->configure(qw(gnu_getopt no_ignore_case auto_abbrev)); +our %PATH2CFG; # persistent for socket daemon + +# TBD: this is a documentation mechanism to show a subcommand +# (may) pass options through to another command: +sub pass_through { () } + +# TODO: generate shell completion + help using %CMD and %OPTDESC +# command => [ positional_args, 1-line description, Getopt::Long option spec ] +our %CMD = ( # sorted in order of importance/use: +'query' => [ 'SEARCH_TERMS...', 'search for messages matching terms', qw( + save-as=s output|o=s format|f=s dedupe|d=s thread|t augment|a + limit|n=i sort|s=s@ reverse|r offset=i remote local! extinbox! + since|after=s until|before=s) ], + +'show' => [ 'MID|OID', 'show a given object (Message-ID or object ID)', + qw(type=s solve! format|f=s dedupe|d=s thread|t remote local!), + pass_through('git show') ], + +'add-extinbox' => [ 'URL_OR_PATHNAME', + 'add/set priority of a publicinbox|extindex for extra matches', + qw(prio=i) ], +'ls-extinbox' => [ '[FILTER...]', 'list publicinbox|extindex locations', + qw(format|f=s z local remote) ], +'forget-extinbox' => [ '{URL_OR_PATHNAME|--prune}', + 'exclude further results from a publicinbox|extindex', + qw(prune) ], + +'ls-query' => [ '[FILTER...]', 'list saved search queries', + qw(name-only format|f=s z) ], +'rm-query' => [ 'QUERY_NAME', 'remove a saved search' ], +'mv-query' => [ qw(OLD_NAME NEW_NAME), 'rename a saved search' ], + +'plonk' => [ '--thread|--from=IDENT', + 'exclude mail matching From: or thread from non-Message-ID searches', + qw(stdin| thread|t from|f=s mid=s oid=s) ], +'mark' => [ 'MESSAGE_FLAGS...', + 'set/unset flags on message(s) from stdin', + qw(stdin| oid=s exact by-mid|mid:s) ], +'forget' => [ '[--stdin|--oid=OID|--by-mid=MID]', + 'exclude message(s) on stdin from query results', + qw(stdin| oid=s exact by-mid|mid:s quiet|q) ], + +'purge-mailsource' => [ '{URL_OR_PATHNAME|--all}', + 'remove imported messages from IMAP, Maildirs, and MH', + qw(exact! all jobs:i indexed) ], + +# code repos are used for `show' to solve blobs from patch mails +'add-coderepo' => [ 'PATHNAME', 'add or set priority of a git code repo', + qw(prio=i) ], +'ls-coderepo' => [ '[FILTER_TERMS...]', + 'list known code repos', qw(format|f=s z) ], +'forget-coderepo' => [ 'PATHNAME', + 'stop using repo to solve blobs from patches', + qw(prune) ], + +'add-watch' => [ '[URL_OR_PATHNAME]', + 'watch for new messages and flag changes', + qw(import! flags! interval=s recursive|r exclude=s include=s) ], +'ls-watch' => [ '[FILTER...]', 'list active watches with numbers and status', + qw(format|f=s z) ], +'pause-watch' => [ '[WATCH_NUMBER_OR_FILTER]', qw(all local remote) ], +'resume-watch' => [ '[WATCH_NUMBER_OR_FILTER]', qw(all local remote) ], +'forget-watch' => [ '{WATCH_NUMBER|--prune}', 'stop and forget a watch', + qw(prune) ], + +'import' => [ '{URL_OR_PATHNAME|--stdin}', + 'one-shot import/update from URL or filesystem', + qw(stdin| limit|n=i offset=i recursive|r exclude=s include=s !flags), + ], + +'config' => [ '[...]', 'git-config(1) wrapper for ~/.config/lei/config', + pass_through('git config') ], +'init' => [ '[PATHNAME]', + 'initialize storage, default: ~/.local/share/lei/store', + qw(quiet|q) ], +'daemon-stop' => [ '', 'stop the lei-daemon' ], +'daemon-pid' => [ '', 'show the PID of the lei-daemon' ], +'daemon-env' => [ '[NAME=VALUE...]', 'set, unset, or show daemon environment', + qw(clear| unset|u=s@ z|0) ], +'help' => [ '[SUBCOMMAND]', 'show help' ], + +# XXX do we need this? +# 'git' => [ '[ANYTHING...]', 'git(1) wrapper', pass_through('git') ], + +'reorder-local-store-and-break-history' => [ '[REFNAME]', + 'rewrite git history in an attempt to improve compression', + 'gc!' ] +); # @CMD + +# switch descriptions, try to keep consistent across commands +# $spec: Getopt::Long option specification +# $spec => [@ALLOWED_VALUES (default is first), $description], +# $spec => $description +# "$SUB_COMMAND TAB $spec" => as above +my $stdin_formats = [ 'IN|auto|raw|mboxrd|mboxcl2|mboxcl|mboxo', + 'specify message input format' ]; +my $ls_format = [ 'OUT|plain|json|null', 'listing output format' ]; + +my %OPTDESC = ( +'help|h' => 'show this built-in help', +'quiet|q' => 'be quiet', +'solve!' => 'do not attempt to reconstruct blobs from emails', +'save-as=s' => ['NAME', 'save a search terms by given name'], + +'type=s' => [ 'any|mid|git', 'disambiguate type' ], + +'dedupe|d=s' => ['STRAT|content|oid|mid', + 'deduplication strategy'], +'show thread|t' => 'display entire thread a message belongs to', +'query thread|t' => + 'return all messages in the same thread as the actual match(es)', +'augment|a' => 'augment --output destination instead of clobbering', + +'output|o=s' => [ 'DEST', + "destination (e.g. `/path/to/Maildir', or `-' for stdout)" ], + +'show format|f=s' => [ 'OUT|plain|raw|html|mboxrd|mboxcl2|mboxcl', + 'message/object output format' ], +'mark format|f=s' => $stdin_formats, +'forget format|f=s' => $stdin_formats, +'query format|f=s' => [ 'OUT|maildir|mboxrd|mboxcl2|mboxcl|html|oid', + 'specify output format, default depends on --output'], +'ls-query format|f=s' => $ls_format, +'ls-extinbox format|f=s' => $ls_format, + +'limit|n=i' => ['NUM', + 'limit on number of matches (default: 10000)' ], +'offset=i' => ['OFF', 'search result offset (default: 0)'], + +'sort|s=s@' => [ 'VAL|internaldate,date,relevance,docid', + "order of results `--output'-dependent"], + +'prio=i' => 'priority of query source', + +'local' => 'limit operations to the local filesystem', +'local!' => 'exclude results from the local filesystem', +'remote' => 'limit operations to those requiring network access', +'remote!' => 'prevent operations requiring network access', + +'mid=s' => 'specify the Message-ID of a message', +'oid=s' => 'specify the git object ID of a message', + +'recursive|r' => 'scan directories/mailboxes/newsgroups recursively', +'exclude=s' => 'exclude mailboxes/newsgroups based on pattern', +'include=s' => 'include mailboxes/newsgroups based on pattern', + +'exact' => 'operate on exact header matches only', +'exact!' => 'rely on content match instead of exact header matches', + +'by-mid|mid:s' => [ 'MID', 'match only by Message-ID, ignoring contents' ], +'jobs:i' => 'set parallelism level', + +# xargs, env, use "-0", git(1) uses "-z". Should we support z|0 everywhere? +'z' => 'use NUL \\0 instead of newline (CR) to delimit lines', +'z|0' => 'use NUL \\0 instead of newline (CR) to delimit lines', + +# note: no "--ignore-environment" / "-i" support like env(1) since that +# is one-shot and this is for a persistent daemon: +'clear|' => 'clear the daemon environment', +'unset|u=s@' => ['NAME', + 'unset matching NAME, may be specified multiple times'], +); # %OPTDESC + +sub x_it ($$) { # pronounced "exit" + my ($client, $code) = @_; + if (my $sig = ($code & 127)) { + kill($sig, $client->{pid} // $$); + } else { + $code >>= 8; + if (my $sock = $client->{sock}) { + say $sock "exit=$code"; + } else { # for oneshot + $quit->($code); + } + } +} + +sub emit { + my ($client, $channel) = @_; # $buf = $_[2] + print { $client->{$channel} } $_[2] or die "print FD[$channel]: $!"; +} + +sub err { + my ($client, $buf) = @_; + $buf .= "\n" unless $buf =~ /\n\z/s; + emit($client, 2, $buf); +} + +sub qerr { $_[0]->{opt}->{quiet} or err(@_) } + +sub fail ($$;$) { + my ($client, $buf, $exit_code) = @_; + err($client, $buf); + x_it($client, ($exit_code // 1) << 8); + undef; +} + +sub _help ($;$) { + my ($client, $errmsg) = @_; + my $cmd = $client->{cmd} // 'COMMAND'; + my @info = @{$CMD{$cmd} // [ '...', '...' ]}; + my @top = ($cmd, shift(@info) // ()); + my $cmd_desc = shift(@info); + my @opt_desc; + my $lpad = 2; + for my $sw (@info) { # qw(prio=s + my $desc = $OPTDESC{"$cmd\t$sw"} // $OPTDESC{$sw} // next; + my $arg_vals = ''; + ($arg_vals, $desc) = @$desc if ref($desc) eq 'ARRAY'; + + # lower-case is a keyword (e.g. `content', `oid'), + # ALL_CAPS is a string description (e.g. `PATH') + if ($desc !~ /default/ && $arg_vals =~ /\b([a-z]+)[,\|]/) { + $desc .= "\ndefault: `$1'"; + } + my (@vals, @s, @l); + my $x = $sw; + if ($x =~ s/!\z//) { # solve! => --no-solve + $x = "no-$x"; + } elsif ($x =~ s/:.+//) { # optional args: $x = "mid:s" + @vals = (' [', undef, ']'); + } elsif ($x =~ s/=.+//) { # required arg: $x = "type=s" + @vals = (' ', undef); + } # else: no args $x = 'thread|t' + for (split(/\|/, $x)) { # help|h + length($_) > 1 ? push(@l, "--$_") : push(@s, "-$_"); + } + if (!scalar(@vals)) { # no args 'thread|t' + } elsif ($arg_vals =~ s/\A([A-Z_]+)\b//) { # "NAME" + $vals[1] = $1; + } else { + $vals[1] = uc(substr($l[0], 2)); # "--type" => "TYPE" + } + if ($arg_vals =~ /([,\|])/) { + my $sep = $1; + my @allow = split(/\Q$sep\E/, $arg_vals); + my $must = $sep eq '|' ? 'Must' : 'Can'; + @allow = map { "`$_'" } @allow; + my $last = pop @allow; + $desc .= "\n$must be one of: " . + join(', ', @allow) . " or $last"; + } + my $lhs = join(', ', @s, @l) . join('', @vals); + if ($x =~ /\|\z/) { # "stdin|" or "clear|" + $lhs =~ s/\A--/- , --/; + } else { + $lhs =~ s/\A--/ --/; # pad if no short options + } + $lpad = length($lhs) if length($lhs) > $lpad; + push @opt_desc, $lhs, $desc; + } + my $msg = $errmsg ? "E: $errmsg\n" : ''; + $msg .= <<EOF; +usage: lei @top + $cmd_desc + +EOF + $lpad += 2; + local $Text::Wrap::columns = 78 - $lpad; + my $padding = ' ' x ($lpad + 2); + while (my ($lhs, $rhs) = splice(@opt_desc, 0, 2)) { + $msg .= ' '.pack("A$lpad", $lhs); + $rhs = wrap('', '', $rhs); + $rhs =~ s/\n/\n$padding/sg; # LHS pad continuation lines + $msg .= $rhs; + $msg .= "\n"; + } + my $channel = $errmsg ? 2 : 1; + emit($client, $channel, $msg); + x_it($client, $errmsg ? 1 << 8 : 0); # stderr => failure + undef; +} + +sub optparse ($$$) { + my ($client, $cmd, $argv) = @_; + $client->{cmd} = $cmd; + my $opt = $client->{opt} = {}; + my $info = $CMD{$cmd} // [ '[...]', '(undocumented command)' ]; + my ($proto, $desc, @spec) = @$info; + push @spec, qw(help|h); + my $lone_dash; + if ($spec[0] =~ s/\|\z//s) { # "stdin|" or "clear|" allows "-" alias + $lone_dash = $spec[0]; + $opt->{$spec[0]} = \(my $var); + push @spec, '' => \$var; + } + $glp->getoptionsfromarray($argv, $opt, @spec) or + return _help($client, "bad arguments or options for $cmd"); + return _help($client) if $opt->{help}; + + # "-" aliases "stdin" or "clear" + $opt->{$lone_dash} = ${$opt->{$lone_dash}} if defined $lone_dash; + + my $i = 0; + my $POS_ARG = '[A-Z][A-Z0-9_]+'; + my ($err, $inf); + my @args = split(/ /, $proto); + for my $var (@args) { + if ($var =~ /\A$POS_ARG\.\.\.\z/o) { # >= 1 args; + $inf = defined($argv->[$i]) and last; + $var =~ s/\.\.\.\z//; + $err = "$var not supplied"; + } elsif ($var =~ /\A$POS_ARG\z/o) { # required arg at $i + $argv->[$i++] // ($err = "$var not supplied"); + } elsif ($var =~ /\.\.\.\]\z/) { # optional args start + $inf = 1; + last; + } elsif ($var =~ /\A\[$POS_ARG\]\z/) { # one optional arg + $i++; + } elsif ($var =~ /\A.+?\|/) { # required FOO|--stdin + my @or = split(/\|/, $var); + my $ok; + for my $o (@or) { + if ($o =~ /\A--([a-z0-9\-]+)/) { + $ok = defined($opt->{$1}); + last; + } elsif (defined($argv->[$i])) { + $ok = 1; + $i++; + last; + } # else continue looping + } + my $last = pop @or; + $err = join(', ', @or) . " or $last must be set"; + } else { + warn "BUG: can't parse `$var' in $proto"; + } + last if $err; + } + # warn "inf=$inf ".scalar(@$argv). ' '.scalar(@args)."\n"; + if (!$inf && scalar(@$argv) > scalar(@args)) { + $err //= 'too many arguments'; + } + $err ? fail($client, "usage: lei $cmd $proto\nE: $err") : 1; +} + +sub dispatch { + my ($client, $cmd, @argv) = @_; + local $SIG{__WARN__} = sub { err($client, "@_") }; + local $SIG{__DIE__} = 'DEFAULT'; + return _help($client, 'no command given') unless defined($cmd); + my $func = "lei_$cmd"; + $func =~ tr/-/_/; + if (my $cb = __PACKAGE__->can($func)) { + optparse($client, $cmd, \@argv) or return; + $cb->($client, @argv); + } elsif (grep(/\A-/, $cmd, @argv)) { # --help or -h only + my $opt = {}; + $glp->getoptionsfromarray([$cmd, @argv], $opt, qw(help|h)) or + return _help($client, 'bad arguments or options'); + _help($client); + } else { + fail($client, "`$cmd' is not an lei command"); + } +} + +sub _lei_cfg ($;$) { + my ($client, $creat) = @_; + my $env = $client->{env}; + my $cfg_dir = File::Spec->canonpath(( $env->{XDG_CONFIG_HOME} // + ($env->{HOME} // '/nonexistent').'/.config').'/lei'); + my $f = "$cfg_dir/config"; + my @st = stat($f); + my $cur_st = @st ? pack('dd', $st[10], $st[7]) : ''; # 10:ctime, 7:size + if (my $cfg = $PATH2CFG{$f}) { # reuse existing object in common case + return ($client->{cfg} = $cfg) if $cur_st eq $cfg->{-st}; + } + if (!@st) { + unless ($creat) { + delete $client->{cfg}; + return; + } + -d $cfg_dir or mkpath($cfg_dir) or die "mkpath($cfg_dir): $!\n"; + open my $fh, '>>', $f or die "open($f): $!\n"; + @st = stat($fh) or die "fstat($f): $!\n"; + $cur_st = pack('dd', $st[10], $st[7]); + qerr($client, "I: $f created"); + } + my $cfg = PublicInbox::Config::git_config_dump($f); + $cfg->{-st} = $cur_st; + $cfg->{'-f'} = $f; + $client->{cfg} = $PATH2CFG{$f} = $cfg; +} + +sub _lei_store ($;$) { + my ($client, $creat) = @_; + my $cfg = _lei_cfg($client, $creat); + $cfg->{-lei_store} //= do { + require PublicInbox::LeiStore; + PublicInbox::SearchIdx::load_xapian_writable(); + defined(my $dir = $cfg->{'leistore.dir'}) or return; + PublicInbox::LeiStore->new($dir, { creat => $creat }); + }; +} + +sub lei_show { + my ($client, @argv) = @_; +} + +sub lei_query { + my ($client, @argv) = @_; +} + +sub lei_mark { + my ($client, @argv) = @_; +} + +sub lei_config { + my ($client, @argv) = @_; + my $env = $client->{env}; + if (defined $env->{GIT_CONFIG}) { + my %copy = %$env; + delete $copy{GIT_CONFIG}; + $env = \%copy; + } + if (my @conflict = (grep(/\A-f=?\z/, @argv), + grep(/\A--(?:global|system| + file|config-file)=?\z/x, @argv))) { + return fail($client, "@conflict not supported by lei config"); + } + my $cfg = _lei_cfg($client, 1); + my $cmd = [ qw(git config -f), $cfg->{'-f'}, @argv ]; + my %rdr = map { $_ => $client->{$_} } (0..2); + require PublicInbox::Import; + PublicInbox::Import::run_die($cmd, $env, \%rdr); +} + +sub lei_init { + my ($client, $dir) = @_; + my $cfg = _lei_cfg($client, 1); + my $cur = $cfg->{'leistore.dir'}; + my $env = $client->{env}; + $dir //= ( $env->{XDG_DATA_HOME} // + ($env->{HOME} // '/nonexistent').'/.local/share' + ) . '/lei/store'; + $dir = File::Spec->rel2abs($dir, $env->{PWD}); # PWD is symlink-aware + my @cur = stat($cur) if defined($cur); + $cur = File::Spec->canonpath($cur) if $cur; + my @dir = stat($dir); + my $exists = "I: leistore.dir=$cur already initialized" if @dir; + if (@cur) { + if ($cur eq $dir) { + _lei_store($client, 1)->done; + return qerr($client, $exists); + } + + # some folks like symlinks and bind mounts :P + if (@dir && "$cur[0] $cur[1]" eq "$dir[0] $dir[1]") { + lei_config($client, 'leistore.dir', $dir); + _lei_store($client, 1)->done; + return qerr($client, "$exists (as $cur)"); + } + return fail($client, <<""); +E: leistore.dir=$cur already initialized and it is not $dir + + } + lei_config($client, 'leistore.dir', $dir); + _lei_store($client, 1)->done; + $exists //= "I: leistore.dir=$dir newly initialized"; + return qerr($client, $exists); +} + +sub lei_daemon_pid { emit($_[0], 1, "$$\n") } + +sub lei_daemon_stop { $quit->(0) } + +sub lei_daemon_env { + my ($client, @argv) = @_; + my $opt = $client->{opt}; + if (defined $opt->{clear}) { + %ENV = (); + } elsif (my $u = $opt->{unset}) { + delete @ENV{@$u}; + } + if (@argv) { + %ENV = (%ENV, map { split(/=/, $_, 2) } @argv); + } elsif (!defined($opt->{clear}) && !$opt->{unset}) { + my $eor = $opt->{z} ? "\0" : "\n"; + my $buf = ''; + while (my ($k, $v) = each %ENV) { $buf .= "$k=$v$eor" } + emit($client, 1, $buf) + } +} + +sub lei_help { _help($_[0]) } + +sub reap_exec { # dwaitpid callback + my ($client, $pid) = @_; + x_it($client, $?); +} + +sub lei_git { # support passing through random git commands + my ($client, @argv) = @_; + my %rdr = map { $_ => $client->{$_} } (0..2); + my $pid = spawn(['git', @argv], $client->{env}, \%rdr); + PublicInbox::DS::dwaitpid($pid, \&reap_exec, $client); +} + +sub accept_dispatch { # Listener {post_accept} callback + my ($sock) = @_; # ignore other + $sock->blocking(1); + $sock->autoflush(1); + my $client = { sock => $sock }; + vec(my $rin = '', fileno($sock), 1) = 1; + # `say $sock' triggers "die" in lei(1) + for my $i (0..2) { + if (select(my $rout = $rin, undef, undef, 1)) { + my $fd = IO::FDPass::recv(fileno($sock)); + if ($fd >= 0) { + my $rdr = ($fd == 0 ? '<&=' : '>&='); + if (open(my $fh, $rdr, $fd)) { + $client->{$i} = $fh; + } else { + say $sock "open($rdr$fd) (FD=$i): $!"; + return; + } + } else { + say $sock "recv FD=$i: $!"; + return; + } + } else { + say $sock "timed out waiting to recv FD=$i"; + return; + } + } + # $ARGV_STR = join("]\0[", @ARGV); + # $ENV_STR = join('', map { "$_=$ENV{$_}\0" } keys %ENV); + # $line = "$$\0\0>$ARGV_STR\0\0>$ENV_STR\0\0"; + my ($client_pid, $argv, $env) = do { + local $/ = "\0\0\0"; # yes, 3 NULs at EOL, not 2 + chomp(my $line = <$sock>); + split(/\0\0>/, $line, 3); + }; + my %env = map { split(/=/, $_, 2) } split(/\0/, $env); + if (chdir($env{PWD})) { + $client->{env} = \%env; + $client->{pid} = $client_pid; + eval { dispatch($client, split(/\]\0\[/, $argv)) }; + say $sock $@ if $@; + } else { + say $sock "chdir($env{PWD}): $!"; # implicit close + } +} + +sub noop {} + +# lei(1) calls this when it can't connect +sub lazy_start { + my ($path, $err) = @_; + if ($err == ECONNREFUSED) { + unlink($path) or die "unlink($path): $!"; + } elsif ($err != ENOENT) { + die "connect($path): $!"; + } + require IO::FDPass; + umask(077) // die("umask(077): $!"); + my $l = IO::Socket::UNIX->new(Local => $path, + Listen => 1024, + Type => SOCK_STREAM) or + $err = $!; + $l or return die "bind($path): $err"; + my @st = stat($path) or die "stat($path): $!"; + my $dev_ino_expect = pack('dd', $st[0], $st[1]); # dev+ino + pipe(my ($eof_r, $eof_w)) or die "pipe: $!"; + my $oldset = PublicInbox::Sigfd::block_signals(); + my $pid = fork // die "fork: $!"; + return if $pid; + openlog($path, 'pid', 'user'); + local $SIG{__DIE__} = sub { + syslog('crit', "@_"); + exit $! if $!; + exit $? >> 8 if $? >> 8; + exit 255; + }; + local $SIG{__WARN__} = sub { syslog('warning', "@_") }; + open(STDIN, '+<', '/dev/null') or die "redirect stdin failed: $!\n"; + open STDOUT, '>&STDIN' or die "redirect stdout failed: $!\n"; + open STDERR, '>&STDIN' or die "redirect stderr failed: $!\n"; + setsid(); + $pid = fork // die "fork: $!"; + return if $pid; + $0 = "lei-daemon $path"; + local %PATH2CFG; + require PublicInbox::Listener; + require PublicInbox::EOFpipe; + $l->blocking(0); + $eof_w->blocking(0); + $eof_r->blocking(0); + my $listener = PublicInbox::Listener->new($l, \&accept_dispatch, $l); + my $exit_code; + local $quit = sub { + $exit_code //= shift; + my $tmp = $listener or exit($exit_code); + unlink($path) if defined($path); + syswrite($eof_w, '.'); + $l = $listener = $path = undef; + $tmp->close if $tmp; # DS::close + PublicInbox::DS->SetLoopTimeout(1000); + }; + PublicInbox::EOFpipe->new($eof_r, sub {}, undef); + my $sig = { + CHLD => \&PublicInbox::DS::enqueue_reap, + QUIT => $quit, + INT => $quit, + TERM => $quit, + HUP => \&noop, + USR1 => \&noop, + USR2 => \&noop, + }; + my $sigfd = PublicInbox::Sigfd->new($sig, $SFD_NONBLOCK); + local %SIG = (%SIG, %$sig) if !$sigfd; + if ($sigfd) { # TODO: use inotify/kqueue to detect unlinked sockets + PublicInbox::DS->SetLoopTimeout(5000); + } else { + # wake up every second to accept signals if we don't + # have signalfd or IO::KQueue: + PublicInbox::Sigfd::sig_setmask($oldset); + PublicInbox::DS->SetLoopTimeout(1000); + } + PublicInbox::DS->SetPostLoopCallback(sub { + my ($dmap, undef) = @_; + if (@st = defined($path) ? stat($path) : ()) { + if ($dev_ino_expect ne pack('dd', $st[0], $st[1])) { + warn "$path dev/ino changed, quitting\n"; + $path = undef; + } + } elsif (defined($path)) { + warn "stat($path): $!, quitting ...\n"; + undef $path; # don't unlink + $quit->(); + } + return 1 if defined($path); + my $now = now(); + my $n = 0; + for my $s (values %$dmap) { + $s->can('busy') or next; + if ($s->busy($now)) { + ++$n; + } else { + $s->close; + } + } + $n; # true: continue, false: stop + }); + PublicInbox::DS->EventLoop; + exit($exit_code // 0); +} + +# for users w/o IO::FDPass +sub oneshot { + my ($main_pkg) = @_; + my $exit = $main_pkg->can('exit'); # caller may override exit() + local $quit = $exit if $exit; + local %PATH2CFG; + umask(077) // die("umask(077): $!"); + dispatch({ + 0 => *STDIN{IO}, + 1 => *STDOUT{IO}, + 2 => *STDERR{IO}, + env => \%ENV + }, @ARGV); +} + +1; |