# Copyright (C) 2020-2021 all contributors
# License: AGPL-3.0+
# 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 PublicInbox::LeiExternal
PublicInbox::LeiQuery);
use Getopt::Long ();
use Socket qw(AF_UNIX SOCK_SEQPACKET MSG_EOR pack_sockaddr_un);
use Errno qw(EPIPE EAGAIN ECONNREFUSED ENOENT ECONNRESET);
use Cwd qw(getcwd);
use POSIX qw(strftime);
use IO::Handle ();
use Fcntl qw(SEEK_SET);
use PublicInbox::Config;
use PublicInbox::Syscall qw(EPOLLIN);
use PublicInbox::DS qw(dwaitpid);
use PublicInbox::Spawn qw(spawn popen_rd);
use PublicInbox::Lock;
use PublicInbox::Eml;
use PublicInbox::Import;
use PublicInbox::ContentHash qw(git_sha);
use Time::HiRes qw(stat); # ctime comparisons for config cache
use File::Path qw(mkpath);
use File::Spec;
use Sys::Syslog qw(openlog syslog closelog);
our $quit = \&CORE::exit;
our ($current_lei, $errors_log, $listener, $oldset, $dir_idle,
$recv_cmd, $send_cmd);
my $GLP = Getopt::Long::Parser->new;
$GLP->configure(qw(gnu_getopt no_ignore_case auto_abbrev));
my $GLP_PASS = Getopt::Long::Parser->new;
$GLP_PASS->configure(qw(gnu_getopt no_ignore_case auto_abbrev pass_through));
our %PATH2CFG; # persistent for socket daemon
our $MDIR2CFGPATH; # /path/to/maildir => { /path/to/config => [ ino watches ] }
# TBD: this is a documentation mechanism to show a subcommand
# (may) pass options through to another command:
sub pass_through { $GLP_PASS }
my $OPT;
sub opt_dash ($$) {
my ($spec, $re_str) = @_; # 'limit|n=i', '([0-9]+)'
my ($key) = ($spec =~ m/\A([a-z]+)/g);
my $cb = sub { # Getopt::Long "<>" catch-all handler
my ($arg) = @_;
if ($arg =~ /\A-($re_str)\z/) {
$OPT->{$key} = $1;
} elsif ($arg eq '--') { # "--" arg separator, ignore first
push @{$OPT->{-argv}}, $arg if $OPT->{'--'}++;
# lone (single) dash is handled elsewhere
} elsif (substr($arg, 0, 1) eq '-') {
if ($OPT->{'--'}) {
push @{$OPT->{-argv}}, $arg;
} else {
die "bad argument: $arg\n";
}
} else {
push @{$OPT->{-argv}}, $arg;
}
};
($spec, '<>' => $cb, $GLP_PASS) # for Getopt::Long
}
# rel2abs preserves symlinks in parent, unlike abs_path
sub rel2abs {
my ($self, $p) = @_;
if (index($p, '/') == 0) { # already absolute
$p =~ tr!/!/!s; # squeeze redundant slashes
chop($p) if substr($p, -1, 1) eq '/';
return $p;
}
my $pwd = $self->{env}->{PWD};
if (defined $pwd) {
if (my @st_pwd = stat($pwd)) {
my @st_cwd = stat($self->{3}) or die "stat({3}): $!";
"@st_pwd[1,0]" eq "@st_cwd[1,0]" or
$self->{env}->{PWD} = $pwd = undef;
} else { # PWD was invalid
$self->{env}->{PWD} = $pwd = undef;
}
}
$pwd //= $self->{env}->{PWD} = getcwd() // die "getcwd: $!";
File::Spec->rel2abs($p, $pwd);
}
# abs_path resolves symlinks in parent iff all parents exist
sub abs_path { Cwd::abs_path($_[1]) // rel2abs(@_) }
sub canonpath_harder {
my $p = $_[-1]; # $_[0] may be self
$p = File::Spec->canonpath($p);
$p =~ m!(?:/*|\A)\.\.(?:/*|\z)! && -e $p ? Cwd::abs_path($p) : $p;
}
sub share_path ($) { # $HOME/.local/share/lei/$FOO
my ($self) = @_;
rel2abs($self, ($self->{env}->{XDG_DATA_HOME} //
($self->{env}->{HOME} // '/nonexistent').'/.local/share')
.'/lei');
}
sub store_path ($) { share_path($_[0]) . '/store' }
sub _config_path ($) {
my ($self) = @_;
rel2abs($self, ($self->{env}->{XDG_CONFIG_HOME} //
($self->{env}->{HOME} // '/nonexistent').'/.config')
.'/lei/config');
}
sub cache_dir ($) {
my ($self) = @_;
rel2abs($self, ($self->{env}->{XDG_CACHE_HOME} //
($self->{env}->{HOME} // '/nonexistent').'/.cache')
.'/lei');
}
sub url_folder_cache {
my ($self) = @_;
require PublicInbox::SharedKV; # URI => updated_at_sec_
PublicInbox::SharedKV->new(cache_dir($self).'/uri_folder');
}
sub ale {
my ($self) = @_;
$self->{ale} //= do {
require PublicInbox::LeiALE;
$self->_lei_cfg(1)->{ale} //= PublicInbox::LeiALE->new($self);
};
}
sub index_opt {
# TODO: drop underscore variants everywhere, they're undocumented
qw(fsync|sync! jobs|j=i indexlevel|L=s compact
max_size|max-size=s sequential-shard
batch_size|batch-size=s skip-docdata)
}
my @c_opt = qw(c=s@ C=s@ quiet|q);
my @net_opt = (qw(no-torsocks torsocks=s), PublicInbox::LeiQuery::curl_opt());
my @lxs_opt = qw(remote! local! external! include|I=s@ exclude=s@ only|O=s@
import-remote!);
# we don't support -C as an alias for --find-copies since it's already
# used for chdir
our @diff_opt = qw(unified|U=i output-indicator-new=s output-indicator-old=s
output-indicator-context=s indent-heuristic!
minimal patience histogram anchored=s@ diff-algorithm=s
color-moved:s color-moved-ws=s no-color-moved no-color-moved-ws
word-diff:s word-diff-regex=s color-words:s no-renames
rename-empty! check ws-error-highlight=s full-index binary
abbrev:i break-rewrites|B:s find-renames|M:s find-copies:s
find-copies-harder irreversible-delete|D l=i diff-filter=s
S=s G=s find-object=s pickaxe-all pickaxe-regex O=s R
relative:s text|a ignore-cr-at-eol ignore-space-at-eol
ignore-space-change|b ignore-all-space|w ignore-blank-lines
inter-hunk-context=i function-context|W exit-code ext-diff
no-ext-diff textconv! src-prefix=s dst-prefix=s no-prefix
line-prefix=s);
# we generate shell completion + help using %CMD and %OPTDESC,
# see lei__complete() and PublicInbox::LeiHelp
# command => [ positional_args, 1-line description, Getopt::Long option spec ]
our %CMD = ( # sorted in order of importance/use:
'q' => [ '--stdin|SEARCH_TERMS...', 'search for messages matching terms',
'stdin|', # /|\z/ must be first for lone dash
@lxs_opt, @net_opt,
qw(save! output|mfolder|o=s format|f=s dedupe|d=s threads|t+
sort|s=s reverse|r offset=i pretty jobs|j=s globoff|g augment|a
import-before! lock=s@ rsyncable alert=s@ mua=s verbose|v+
shared color! mail-sync!), @c_opt, opt_dash('limit|n=i', '[0-9]+') ],
'up' => [ 'OUTPUT...|--all', 'update saved search',
qw(jobs|j=s lock=s@ alert=s@ mua=s verbose|v+ exclude=s@
remote-fudge-time=s all:s remote! local! external!), @c_opt ],
'lcat' => [ '--stdin|MSGID_OR_URL...', 'display local copy of message(s)',
'stdin|', # /|\z/ must be first for lone dash
# some of these options are ridiculous for lcat
@lxs_opt, @net_opt,
qw(output|mfolder|o=s format|f=s dedupe|d=s threads|t+
sort|s=s reverse|r offset=i jobs|j=s globoff|g augment|a
import-before! lock=s@ rsyncable alert=s@ mua=s verbose|v+
color!), @c_opt, opt_dash('limit|n=i', '[0-9]+') ],
'blob' => [ 'OID', 'show a git blob, reconstructing from mail if necessary',
qw(git-dir=s@ cwd! verbose|v+ mail! oid-a|A=s path-a|a=s path-b|b=s),
@lxs_opt, @net_opt, @c_opt ],
'rediff' => [ '--stdin|LOCATION...',
'regenerate a diff with different options',
'stdin|', # /|\z/ must be first for lone dash
qw(git-dir=s@ cwd! verbose|v+ color:s no-color drq:1 dequote-only:1),
@diff_opt, @lxs_opt, @net_opt, @c_opt ],
'mail-diff' => [ '--stdin|LOCATION...', 'diff the contents of emails',
'stdin|', # /|\z/ must be first for lone dash
qw(verbose|v+ color:s no-color raw-header),
@diff_opt, @net_opt, @c_opt ],
'add-external' => [ 'LOCATION',
'add/set priority of a publicinbox|extindex for extra matches',
qw(boost=i mirror=s inbox-version=i epoch=s verbose|v+),
@c_opt, index_opt(), @net_opt ],
'ls-external' => [ '[FILTER]', 'list publicinbox|extindex locations',
qw(format|f=s z|0 globoff|g invert-match|v local remote), @c_opt ],
'ls-label' => [ '', 'list labels', qw(z|0 stats:s), @c_opt ],
'ls-mail-sync' => [ '[FILTER]', 'list mail sync folders',
qw(z|0 globoff|g invert-match|v local remote), @c_opt ],
'ls-mail-source' => [ 'URL', 'list IMAP or NNTP mail source folders',
qw(z|0 ascii l pretty url), @c_opt ],
'forget-external' => [ 'LOCATION...|--prune',
'exclude further results from a publicinbox|extindex',
qw(prune), @c_opt ],
'ls-search' => [ '[PREFIX]', 'list saved search queries',
qw(format|f=s pretty l ascii z|0), @c_opt ],
'forget-search' => [ 'OUTPUT...|--prune', 'forget a saved search',
qw(verbose|v+ prune:s), @c_opt ],
'edit-search' => [ 'OUTPUT', "edit saved search via `git config --edit'",
@c_opt ],
'rm' => [ '--stdin|LOCATION...',
'remove a message from the index and prevent reindexing',
'stdin|', # /|\z/ must be first for lone dash
qw(in-format|F=s lock=s@), @net_opt, @c_opt ],
'plonk' => [ '--threads|--from=IDENT',
'exclude mail matching From: or threads from non-Message-ID searches',
qw(stdin| threads|t from|f=s mid=s oid=s), @c_opt ],
'tag' => [ 'KEYWORDS...',
'set/unset keywords and/or labels on message(s)',
qw(stdin| in-format|F=s input|i=s@ oid=s@ mid=s@),
@net_opt, @c_opt, pass_through('-kw:foo for delete') ],
'purge-mailsource' => [ 'LOCATION|--all',
'remove imported messages from IMAP, Maildirs, and MH',
qw(exact! all jobs:i indexed), @c_opt ],
'add-watch' => [ 'LOCATION...', 'watch for new messages and flag changes',
qw(poll-interval=s state=s recursive|r), @c_opt ],
'rm-watch' => [ 'LOCATION...', 'remove specified watch(es)',
qw(recursive|r), @c_opt ],
'ls-watch' => [ '[FILTER...]', 'list active watches with numbers and status',
qw(l z|0), @c_opt ],
'pause-watch' => [ '[WATCH_NUMBER_OR_FILTER]', qw(all local remote), @c_opt ],
'resume-watch' => [ '[WATCH_NUMBER_OR_FILTER]', qw(all local remote), @c_opt ],
'forget-watch' => [ '{WATCH_NUMBER|--prune}', 'stop and forget a watch',
qw(prune), @c_opt ],
'index' => [ 'LOCATION...', 'one-time index from URL or filesystem',
qw(in-format|F=s kw! offset=i recursive|r exclude=s include|I=s
verbose|v+ incremental!), @net_opt, # mainly for --proxy=
@c_opt ],
'import' => [ 'LOCATION...|--stdin',
'one-time import/update from URL or filesystem',
qw(stdin| offset=i recursive|r exclude=s include|I=s new-only
lock=s@ in-format|F=s kw! verbose|v+ incremental! mail-sync!),
@net_opt, @c_opt ],
'forget-mail-sync' => [ 'LOCATION...',
'forget sync information for a mail folder', @c_opt ],
'refresh-mail-sync' => [ 'LOCATION...|--all',
'prune dangling sync data for a mail folder', 'all:s', @c_opt ],
'export-kw' => [ 'LOCATION...|--all',
'one-time export of keywords of sync sources',
qw(all:s mode=s), @net_opt, @c_opt ],
'convert' => [ 'LOCATION...|--stdin',
'one-time conversion from URL or filesystem to another format',
qw(stdin| in-format|F=s out-format|f=s output|mfolder|o=s lock=s@ kw!),
@net_opt, @c_opt ],
'p2q' => [ 'FILE|COMMIT_OID|--stdin',
"use a patch to generate a query for `lei q --stdin'",
qw(stdin| want|w=s@ uri debug), @c_opt ],
'config' => [ '[...]', sub {
'git-config(1) wrapper for '._config_path($_[0]);
}, qw(config-file|system|global|file|f=s), # for conflict detection
qw(edit|e c=s@ C=s@), pass_through('git config') ],
'inspect' => [ 'ITEMS...|--stdin', 'inspect lei/store and/or local external',
qw(stdin| pretty ascii dir|d=s), @c_opt ],
'init' => [ '[DIRNAME]', sub {
"initialize storage, default: ".store_path($_[0]);
}, @c_opt ],
'daemon-kill' => [ '[-SIGNAL]', 'signal the lei-daemon',
# "-C DIR" conflicts with -CHLD, here, and chdir makes no sense, here
opt_dash('signal|s=s', '[0-9]+|(?:[A-Z][A-Z0-9]+)') ],
'daemon-pid' => [ '', 'show the PID of the lei-daemon' ],
'help' => [ '[SUBCOMMAND]', 'show help' ],
# TODO
#'reorder-local-store-and-break-history' => [ '[REFNAME]',
# 'rewrite git history in an attempt to improve compression',
# qw(gc!), @c_opt ],
#'fuse-mount' => [ 'PATHNAME', 'expose lei/store as Maildir(s)', @c_opt ],
#
# internal commands are prefixed with '_'
'_complete' => [ '[...]', 'internal shell completion helper',
pass_through('everything') ],
); # @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 = [ 'MAIL_FORMAT|eml|mboxrd|mboxcl2|mboxcl|mboxo',
'specify message input format' ];
my $ls_format = [ 'OUT|plain|json|null', 'listing output format' ];
# we use \x{a0} (non-breaking SP) to avoid wrapping in PublicInbox::LeiHelp
my %OPTDESC = (
'help|h' => 'show this built-in help',
'c=s@' => [ 'NAME=VALUE', 'set config option' ],
'C=s@' => [ 'DIR', 'chdir to specify to directory' ],
'quiet|q' => 'be quiet',
'lock=s@' => [ 'METHOD|dotlock|fcntl|flock|none',
'mbox(5) locking method(s) to use (default: fcntl,dotlock)' ],
'incremental! import' => 'import already seen IMAP and NNTP articles',
'globoff|g' => "do not match locations using '*?' wildcards ".
"and\xa0'[]'\x{a0}ranges",
'invert-match|v' => 'select non-matching lines',
'color!' => 'disable color (for --format=text)',
'verbose|v+' => 'be more verbose',
'external!' => 'do not use externals',
'mail!' => 'do not look in mail storage for OID',
'cwd!' => 'do not look in git repo of current working directory',
'oid-a|A=s' => 'pre-image OID',
'path-a|a=s' => 'pre-image pathname associated with OID',
'path-b|b=s' => 'post-image pathname associated with OID',
'git-dir=s@' => 'additional git repository to scan',
'dir|d=s inspect' =>
'specify a inboxdir, extindex topdir or Xapian shard',
'proxy=s' => [ 'PROTO://HOST[:PORT]', # shared with curl(1)
"proxy for (e.g. `socks5h://0:9050')" ],
'torsocks=s' => ['VAL|auto|no|yes',
'whether or not to wrap git and curl commands with torsocks'],
'no-torsocks' => 'alias for --torsocks=no',
'save!' => "do not save a search for `lei up'",
'import-remote!' => 'do not memoize remote messages into local store',
'type=s' => [ 'any|mid|git', 'disambiguate type' ],
'dedupe|d=s' => ['STRATEGY|content|oid|mid|none',
'deduplication strategy'],
'threads|t+' =>
'return all messages in the same threads as the actual match(es)',
'want|w=s@' => [ 'PREFIX|dfpost|dfn', # common ones in help...
'search prefixes to extract (default: dfpost7)' ],
'alert=s@' => ['CMD,:WINCH,:bell,',
'run command(s) or perform ops when done writing to output ' .
'(default: ":WINCH,:bell" with --mua and Maildir/IMAP output, ' .
'nothing otherwise)' ],
'augment|a' => 'augment --output destination instead of clobbering',
'output|mfolder|o=s' => [ 'MFOLDER',
"destination (e.g.\xa0`/path/to/Maildir', ".
"or\xa0`-'\x{a0}for\x{a0}stdout)" ],
'mua=s' => [ 'CMD',
"MUA to run on --output Maildir or mbox (e.g.\xa0`mutt\xa0-f\xa0%f')" ],
'new-only import' => 'only import new messages from IMAP source',
'inbox-version=i' => [ 'NUM|1|2',
'force a public-inbox version with --mirror'],
'mirror=s' => [ 'URL', 'mirror a public-inbox'],
# public-inbox-index options
'fsync!' => 'speed up indexing after --mirror, risk index corruption',
'compact' => 'run compact index after mirroring',
'indexlevel|L=s' => [ 'LEVEL|full|medium|basic',
"indexlevel with --mirror (default: full)" ],
'max_size|max-size=s' => [ 'SIZE',
'do not index messages larger than SIZE (default: infinity)' ],
'batch_size|batch-size=s' => [ 'SIZE',
'flush changes to OS after given number of bytes (default: 1m)' ],
'sequential-shard' =>
'index Xapian shards sequentially for slow storage',
'skip-docdata' =>
'drop compatibility w/ public-inbox <1.6 to save ~1.5% space',
'format|f=s q' => [
'OUT|maildir|mboxrd|mboxcl2|mboxcl|mboxo|html|json|jsonl|concatjson',
'specify output format, default depends on --output'],
'exclude=s@ q' => [ 'LOCATION',
'exclude specified external(s) from search' ],
'include|I=s@ q' => [ 'LOCATION',
'include specified external(s) in search' ],
'only|O=s@ q' => [ 'LOCATION',
'only use specified external(s) for search' ],
'jobs=s q' => [ '[SEARCH_JOBS][,WRITER_JOBS]',
'control number of search and writer jobs' ],
'jobs|j=i add-external' => 'set parallelism when indexing after --mirror',
'in-format|F=s' => $stdin_formats,
'format|f=s ls-search' => ['OUT|json|jsonl|concatjson',
'listing output format' ],
'l ls-search' => 'long listing format',
'l ls-watch' => 'long listing format',
'l ls-mail-source' => 'long listing format',
'url ls-mail-source' => 'show full URL of newsgroup or IMAP folder',
'format|f=s ls-external' => $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|received|relevance|docid',
"order of results is `--output'-dependent"],
'reverse|r' => 'reverse search results', # like sort(1)
'boost=i' => 'increase/decrease priority of results (default: 0)',
'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',
# up, refresh-mail-sync, export-kw
'all:s' => ['TYPE|local|remote', 'all remote or local folders' ],
'remote-fudge-time=s' => [ 'INTERVAL',
'look for mail INTERVAL older than the last successful query' ],
'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' ],
'kw!' => 'disable/enable importing keywords (aka "flags")',
# xargs, env, use "-0", git(1) uses "-z". We support z|0 everywhere
'z|0' => 'use NUL \\0 instead of newline (CR) to delimit lines',
'signal|s=s' => [ 'SIG', 'signal to send lei-daemon (default: TERM)' ],
); # %OPTDESC
my %CONFIG_KEYS = (
'leistore.dir' => 'top-level storage location',
);
my @WQ_KEYS = qw(lxs l2m ikw pmd wq1 lne v2w); # internal workers
sub _drop_wq {
my ($self) = @_;
for my $wq (grep(defined, delete(@$self{@WQ_KEYS}))) {
$wq->wq_kill('-TERM');
$wq->DESTROY;
}
}
# pronounced "exit": x_it(1 << 8) => exit(1); x_it(13) => SIGPIPE
sub x_it ($$) {
my ($self, $code) = @_;
local $current_lei = $self;
# make sure client sees stdout before exit
$self->{1}->autoflush(1) if $self->{1};
stop_pager($self);
if ($self->{pkt_op_p}) { # worker => lei-daemon
$self->{pkt_op_p}->pkt_do('x_it', $code);
} elsif ($self->{sock}) { # lei->daemon => lei(1) client
send($self->{sock}, "x_it $code", MSG_EOR);
} elsif ($quit == \&CORE::exit) { # an admin (one-shot) command
exit($code >> 8);
} # else ignore if client disconnected
}
sub err ($;@) {
my $self = shift;
my $err = $self->{2} // ($self->{pgr} // [])->[2] // *STDERR{GLOB};
my @eor = (substr($_[-1]//'', -1, 1) eq "\n" ? () : ("\n"));
print $err @_, @eor and return;
my $old_err = delete $self->{2};
close($old_err) if $! == EPIPE && $old_err;
$err = $self->{2} = ($self->{pgr} // [])->[2] // *STDERR{GLOB};
print $err @_, @eor or print STDERR @_, @eor;
}
sub qerr ($;@) { $_[0]->{opt}->{quiet} or err(shift, @_) }
sub qfin { # show message on finalization (LeiFinmsg)
my ($lei, $msg) = @_;
return if $lei->{opt}->{quiet};
$lei->{fmsg} ? push(@{$lei->{fmsg}}, "$msg\n") : qerr($lei, $msg);
}
sub fail_handler ($;$$) {
my ($lei, $code, $io) = @_;
local $current_lei = $lei;
close($io) if $io; # needed to avoid warnings on SIGPIPE
_drop_wq($lei);
x_it($lei, $code // (1 << 8));
}
sub sigpipe_handler { # handles SIGPIPE from @WQ_KEYS workers
fail_handler($_[0], 13, delete $_[0]->{1});
}
sub fail ($$;$) {
my ($self, $msg, $exit_code) = @_;
local $current_lei = $self;
$self->{failed}++;
warn(substr($msg, -1, 1) eq "\n" ? $msg : "$msg\n") if defined $msg;
$self->{pkt_op_p}->pkt_do('fail_handler') if $self->{pkt_op_p};
x_it($self, ($exit_code // 1) << 8);
undef;
}
sub out ($;@) {
my $self = shift;
return if print { $self->{1} // return } @_; # likely
return note_sigpipe($self, 1) if $! == EPIPE;
my $err = "error writing to output: $!";
delete $self->{1};
fail($self, $err);
}
sub puts ($;@) { out(shift, map { "$_\n" } @_) }
sub child_error { # passes non-fatal curl exit codes to user
my ($self, $child_error, $msg) = @_; # child_error is $?
local $current_lei = $self;
$child_error ||= 1 << 8;
warn(substr($msg, -1, 1) eq "\n" ? $msg : "$msg\n") if defined $msg;
if ($self->{pkt_op_p}) { # to top lei-daemon
$self->{pkt_op_p}->pkt_do('child_error', $child_error);
} elsif ($self->{sock}) { # to lei(1) client
send($self->{sock}, "child_error $child_error", MSG_EOR);
} else { # non-lei admin command
$self->{child_error} ||= $child_error;
} # else noop if client disconnected
}
sub note_sigpipe { # triggers sigpipe_handler
my ($self, $fd) = @_;
close(delete($self->{$fd})); # explicit close silences Perl warning
$self->{pkt_op_p}->pkt_do('sigpipe_handler') if $self->{pkt_op_p};
x_it($self, 13);
}
sub _lei_atfork_child {
my ($self, $persist) = @_;
# we need to explicitly close things which are on stack
if ($persist) {
open $self->{3}, '<', '/' or die "open(/) $!";
fchdir($self);
close($_) for (grep(defined, delete @$self{qw(0 1 2 sock)}));
if (my $cfg = $self->{cfg}) {
delete @$cfg{qw(-lei_store -watches -lei_note_event)};
}
} else { # worker, Net::NNTP (Net::Cmd) uses STDERR directly
open STDERR, '+>&='.fileno($self->{2}) or warn "open $!";
STDERR->autoflush(1);
POSIX::setpgid(0, $$) // die "setpgid(0, $$): $!";
}
close($_) for (grep(defined, delete @$self{qw(old_1 au_done)}));
delete $self->{-socks};
if (my $op_c = delete $self->{pkt_op_c}) {
close(delete $op_c->{sock});
}
if (my $pgr = delete $self->{pgr}) {
close($_) for (@$pgr[1,2]);
}
close $listener if $listener;
undef $listener;
$dir_idle->force_close if $dir_idle;
undef $dir_idle;
%PATH2CFG = ();
$MDIR2CFGPATH = {};
eval 'no warnings; undef $PublicInbox::LeiNoteEvent::to_flush';
undef $errors_log;
$quit = \&CORE::exit;
if (!$self->{-eml_noisy}) { # only "lei import" sets this atm
my $cb = $SIG{__WARN__} // \&CORE::warn;
$SIG{__WARN__} = sub {
$cb->(@_) unless PublicInbox::Eml::warn_ignore(@_)
};
}
$SIG{TERM} = sub { exit(128 + 15) };
$current_lei = $persist ? undef : $self; # for SIG{__WARN__}
}
sub _delete_pkt_op { # OnDestroy callback to prevent leaks on die
my ($self) = @_;
if (my $op = delete $self->{pkt_op_c}) { # in case of die
$op->close; # PublicInbox::PktOp::close
}
my $pkt_op_p = delete($self->{pkt_op_p}) or return;
close $pkt_op_p->{op_p};
}
sub pkt_op_pair {
my ($self) = @_;
require PublicInbox::OnDestroy;
require PublicInbox::PktOp;
my $end = PublicInbox::OnDestroy->new($$, \&_delete_pkt_op, $self);
@$self{qw(pkt_op_c pkt_op_p)} = PublicInbox::PktOp->pair;
$end;
}
sub incr {
my ($self, $field, $nr) = @_;
$self->{counters}->{$field} += $nr;
}
sub pkt_ops {
my ($lei, $ops) = @_;
$ops->{fail_handler} = [ $lei ];
$ops->{sigpipe_handler} = [ $lei ];
$ops->{x_it} = [ $lei ];
$ops->{child_error} = [ $lei ];
$ops->{incr} = [ $lei ];
$ops;
}
sub workers_start {
my ($lei, $wq, $jobs, $ops, $flds) = @_;
$ops = pkt_ops($lei, { ($ops ? %$ops : ()) });
$ops->{''} //= [ $wq->can('_lei_wq_eof') || \&wq_eof, $lei ];
my $end = $lei->pkt_op_pair;
my $ident = $wq->{-wq_ident} // "lei-$lei->{cmd} worker";
$flds->{lei} = $lei;
$wq->wq_workers_start($ident, $jobs, $lei->oldset, $flds);
delete $lei->{pkt_op_p};
my $op_c = delete $lei->{pkt_op_c};
@$end = ();
$lei->event_step_init;
$wq->wq_wait_async($wq->can('_wq_done_wait') // \&wq_done_wait, $lei);
($op_c, $ops);
}
# call this when we're ready to wait on events and yield to other clients
sub wait_wq_events {
my ($lei, $op_c, $ops) = @_;
for my $wq (grep(defined, @$lei{qw(ikw pmd)})) { # auxiliary WQs
$wq->wq_close;
}
$op_c->{ops} = $ops;
}
sub _help {
require PublicInbox::LeiHelp;
PublicInbox::LeiHelp::call($_[0], $_[1], \%CMD, \%OPTDESC);
}
sub optparse ($$$) {
my ($self, $cmd, $argv) = @_;
# allow _complete --help to complete, not show help
return 1 if substr($cmd, 0, 1) eq '_';
$self->{cmd} = $cmd;
$OPT = $self->{opt} //= {};
my $info = $CMD{$cmd} // [ '[...]' ];
my ($proto, undef, @spec) = @$info;
my $glp = ref($spec[-1]) eq ref($GLP) ? pop(@spec) : $GLP;
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, $OPT, @spec) or
return _help($self, "bad arguments or options for $cmd");
return _help($self) if $OPT->{help};
push @$argv, @{$OPT->{-argv}} if defined($OPT->{-argv});
# "-" 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
$inf = 1 if index($var, '...') > 0;
my @or = split(/\|/, $var);
my $ok;
for my $o (@or) {
if ($o =~ /\A--([a-z0-9\-]+)/) {
my $sw = $1;
# assume pipe/regular file on stdin
# w/o args means stdin
if ($sw eq 'stdin' && !@$argv &&
(-p $self->{0} ||
-f _) && -r _) {
$OPT->{stdin} //= 1;
}
$ok = defined($OPT->{$sw});
last if $ok;
} elsif (defined($argv->[$i])) {
$ok = 1;
$i++;
last;
} # else continue looping
}
last if $ok;
my $last = pop @or;
$err = join(', ', @or) . " or $last must be set";
} else {
warn "BUG: can't parse `$var' in $proto";
}
last if $err;
}
if (!$inf && scalar(@$argv) > scalar(@args)) {
$err //= 'too many arguments';
}
$err ? fail($self, "usage: lei $cmd $proto\nE: $err") : 1;
}
sub _tmp_cfg { # for lei -c = ...
my ($self) = @_;
my $cfg = _lei_cfg($self, 1);
require File::Temp;
my $ft = File::Temp->new(TEMPLATE => 'lei_cfg-XXXX', TMPDIR => 1);
my $tmp = { '-f' => $ft->filename, -tmp => $ft };
$ft->autoflush(1);
print $ft <{-f}: $!");
[include]
path = $cfg->{-f}
EOM
$tmp = $self->{cfg} = bless { %$cfg, %$tmp }, ref($cfg);
for (@{$self->{opt}->{c}}) {
/\A([^=\.]+\.[^=]+)(?:=(.*))?\z/ or return fail($self, <='
EOM
my $name = $1;
my $value = $2 // 1;
_config($self, '--add', $name, $value);
if (defined(my $v = $tmp->{$name})) {
if (ref($v) eq 'ARRAY') {
push @$v, $value;
} else {
$tmp->{$name} = [ $v, $value ];
}
} else {
$tmp->{$name} = $value;
}
}
}
sub lazy_cb ($$$) {
my ($self, $cmd, $pfx) = @_;
my $ucmd = $cmd;
$ucmd =~ tr/-/_/;
my $cb;
$cb = $self->can($pfx.$ucmd) and return $cb;
my $base = $ucmd;
$base =~ s/_([a-z])/\u$1/g;
my $pkg = "PublicInbox::Lei\u$base";
($INC{"PublicInbox/Lei\u$base.pm"} // eval("require $pkg")) ?
$pkg->can($pfx.$ucmd) : undef;
}
sub dispatch {
my ($self, $cmd, @argv) = @_;
fchdir($self);
local %ENV = %{$self->{env}};
local $current_lei = $self; # for __WARN__
$self->{2}->autoflush(1); # keep stdout buffered until x_it|DESTROY
return _help($self, 'no command given') unless defined($cmd);
# do not support Getopt bundling for this
while ($cmd eq '-C' || $cmd eq '-c') {
my $v = shift(@argv) // return fail($self, $cmd eq '-C' ?
'-C DIRECTORY' : '-c =');
push @{$self->{opt}->{substr($cmd, 1, 1)}}, $v;
$cmd = shift(@argv) // return _help($self, 'no command given');
}
if (my $cb = lazy_cb(__PACKAGE__, $cmd, 'lei_')) {
optparse($self, $cmd, \@argv) or return;
$self->{opt}->{c} and (_tmp_cfg($self) // return);
if (my $chdir = $self->{opt}->{C}) {
for my $d (@$chdir) {
next if $d eq ''; # same as git(1)
chdir $d or return fail($self, "cd $d: $!");
}
open $self->{3}, '.' or return fail($self, "open . $!");
}
$cb->($self, @argv);
} elsif (grep(/\A-/, $cmd, @argv)) { # --help or -h only
$GLP->getoptionsfromarray([$cmd, @argv], {}, qw(help|h C=s@))
or return _help($self, 'bad arguments or options');
_help($self);
} else {
fail($self, "`$cmd' is not an lei command");
}
}
sub _lei_cfg ($;$) {
my ($self, $creat) = @_;
return $self->{cfg} if $self->{cfg};
my $f = _config_path($self);
my @st = stat($f);
my $cur_st = @st ? pack('dd', $st[10], $st[7]) : ''; # 10:ctime, 7:size
my ($sto, $sto_dir, $watches, $lne);
if (my $cfg = $PATH2CFG{$f}) { # reuse existing object in common case
return ($self->{cfg} = $cfg) if $cur_st eq $cfg->{-st};
($sto, $sto_dir, $watches, $lne) =
@$cfg{qw(-lei_store leistore.dir -watches
-lei_note_event)};
}
if (!@st) {
unless ($creat) {
delete $self->{cfg};
return bless {}, 'PublicInbox::Config';
}
my ($cfg_dir) = ($f =~ m!(.*?/)[^/]+\z!);
-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($self, "# $f created") if $self->{cmd} ne 'config';
}
my $cfg = PublicInbox::Config->git_config_dump($f, $self->{2});
$cfg->{-st} = $cur_st;
$cfg->{'-f'} = $f;
if ($sto && canonpath_harder($sto_dir // store_path($self))
eq canonpath_harder($cfg->{'leistore.dir'} //
store_path($self))) {
$cfg->{-lei_store} = $sto;
$cfg->{-lei_note_event} = $lne;
$cfg->{-watches} = $watches if $watches;
}
if (scalar(keys %PATH2CFG) > 5) {
# FIXME: use inotify/EVFILT_VNODE to detect unlinked configs
delete(@PATH2CFG{grep(!-f, keys %PATH2CFG)});
}
$self->{cfg} = $PATH2CFG{$f} = $cfg;
refresh_watches($self);
$cfg;
}
sub _lei_store ($;$) {
my ($self, $creat) = @_;
my $cfg = _lei_cfg($self, $creat) // return;
$cfg->{-lei_store} //= do {
require PublicInbox::LeiStore;
my $dir = $cfg->{'leistore.dir'} // store_path($self);
return unless $creat || -d $dir;
PublicInbox::LeiStore->new($dir, { creat => $creat });
};
}
sub _config {
my ($self, @argv) = @_;
my %env = (%{$self->{env}}, GIT_CONFIG => undef);
my $cfg = _lei_cfg($self, 1);
my $cmd = [ qw(git config -f), $cfg->{'-f'}, @argv ];
my %rdr = map { $_ => $self->{$_} } (0..2);
waitpid(spawn($cmd, \%env, \%rdr), 0);
}
sub lei_daemon_pid { puts shift, $$ }
sub lei_daemon_kill {
my ($self) = @_;
my $sig = $self->{opt}->{signal} // 'TERM';
kill($sig, $$) or fail($self, "kill($sig, $$): $!");
}
# Shell completion helper. Used by lei-completion.bash and hopefully
# other shells. Try to do as much here as possible to avoid redundancy
# and improve maintainability.
sub lei__complete {
my ($self, @argv) = @_; # argv = qw(lei and any other args...)
shift @argv; # ignore "lei", the entire command is sent
@argv or return puts $self, grep(!/^_/, keys %CMD), qw(--help -h -C);
my $cmd = shift @argv;
my $info = $CMD{$cmd} // do { # filter matching commands
@argv or puts $self, grep(/\A\Q$cmd\E/, keys %CMD);
return;
};
my ($proto, undef, @spec) = @$info;
my $cur = pop @argv;
my $re = defined($cur) ? qr/\A\Q$cur\E/ : qr/./;
if (substr(my $_cur = $cur // '-', 0, 1) eq '-') { # --switches
# gross special case since the only git-config options
# Consider moving to a table if we need more special cases
# we use Getopt::Long for are the ones we reject, so these
# are the ones we don't reject:
if ($cmd eq 'config') {
puts $self, grep(/$re/, keys %CONFIG_KEYS);
@spec = qw(add z|null get get-all unset unset-all
replace-all get-urlmatch
remove-section rename-section
name-only list|l edit|e
get-color-name get-colorbool);
# fall-through
}
# generate short/long names from Getopt::Long specs
puts $self, grep(/$re/, qw(--help -h -C), map {
if (s/[:=].+\z//) { # req/optional args, e.g output|o=i
} elsif (s/\+\z//) { # verbose|v+
} elsif (s/!\z//) {
# negation: mail! => no-mail|mail
s/([\w\-]+)/$1|no-$1/g
}
map {
my $x = length > 1 ? "--$_" : "-$_";
$x eq $_cur ? () : $x;
} grep(!/_/, split(/\|/, $_, -1)) # help|h
} grep { $OPTDESC{"$_\t$cmd"} || $OPTDESC{$_} } @spec);
} elsif ($cmd eq 'config' && !@argv && !$CONFIG_KEYS{$cur}) {
puts $self, grep(/$re/, keys %CONFIG_KEYS);
}
# switch args (e.g. lei q -f mbox)
if (($argv[-1] // $cur // '') =~ /\A--?([\w\-]+)\z/) {
my $opt = quotemeta $1;
puts $self, map {
my $v = $OPTDESC{$_};
my @v = ref($v) ? split(/\|/, $v->[0]) : ();
# get rid of ALL CAPS placeholder (e.g "OUT")
# (TODO: completion for external paths)
shift(@v) if scalar(@v) && uc($v[0]) eq $v[0];
@v;
} grep(/\A(?:[\w-]+\|)*$opt\b.*?(?:\t$cmd)?\z/, keys %OPTDESC);
}
if (my $cb = lazy_cb($self, $cmd, '_complete_')) {
puts $self, $cb->($self, @argv, $cur ? ($cur) : ());
}
# TODO: URLs, pathnames, OIDs, MIDs, etc... See optparse() for
# proto parsing.
}
sub exec_buf ($$) {
my ($argv, $env) = @_;
my $argc = scalar @$argv;
my $buf = 'exec '.join("\0", scalar(@$argv), @$argv);
while (my ($k, $v) = each %$env) { $buf .= "\0$k=$v" };
$buf;
}
sub start_mua {
my ($self) = @_;
if ($self->{ovv}->{fmt} =~ /\A(?:maildir)\z/) { # TODO: IMAP
refresh_watches($self);
}
my $mua = $self->{opt}->{mua} // return;
my $mfolder = $self->{ovv}->{dst};
my (@cmd, $replaced);
if ($mua =~ /\A(?:mutt|mailx|mail|neomutt)\z/) {
@cmd = ($mua, '-f');
# TODO: help wanted: other common FOSS MUAs
} else {
require Text::ParseWords;
@cmd = Text::ParseWords::shellwords($mua);
# mutt uses '%f' for open-hook with compressed mbox, we follow
@cmd = map { $_ eq '%f' ? ($replaced = $mfolder) : $_ } @cmd;
}
push @cmd, $mfolder unless defined($replaced);
if ($self->{sock}) { # lei(1) client process runs it
# restore terminal: echo $query | lei q --stdin --mua=...
my $io = [];
$io->[0] = $self->{1} if $self->{opt}->{stdin} && -t $self->{1};
send_exec_cmd($self, $io, \@cmd, {});
}
if ($self->{lxs} && $self->{au_done}) { # kick wait_startq
syswrite($self->{au_done}, 'q' x ($self->{lxs}->{jobs} // 0));
}
return unless -t $self->{2}; # XXX how to determine non-TUI MUAs?
$self->{opt}->{quiet} = 1;
delete $self->{-progress};
delete $self->{opt}->{verbose};
}
sub send_exec_cmd { # tell script/lei to execute a command
my ($self, $io, $cmd, $env) = @_;
my $sock = $self->{sock} // die 'lei client gone';
my $fds = [ map { fileno($_) } @$io ];
$send_cmd->($sock, $fds, exec_buf($cmd, $env), MSG_EOR);
}
sub poke_mua { # forces terminal MUAs to wake up and hopefully notice new mail
my ($self) = @_;
my $alerts = $self->{opt}->{alert} // return;
my $sock = $self->{sock};
while (my $op = shift(@$alerts)) {
if ($op eq ':WINCH') {
# hit the process group that started the MUA
send($sock, '-WINCH', MSG_EOR) if $sock;
} elsif ($op eq ':bell') {
out($self, "\a");
} elsif ($op =~ /(? 0, '/dev/stdout' => 1, '/dev/stderr' => 2);
$path_to_fd{"/dev/fd/$_"} = $_ for (0..2);
# this also normalizes the path
sub path_to_fd {
my ($self, $path) = @_;
$path = rel2abs($self, $path);
$path =~ tr!/!/!s;
$path_to_fd{$path} // (
($path =~ m!\A/(?:dev|proc/self)/fd/[0-9]+\z!) ?
fail($self, "cannot open $path from daemon") : -1
);
}
# caller needs to "-t $self->{1}" to check if tty
sub start_pager {
my ($self, $new_env) = @_;
my $fh = popen_rd([qw(git var GIT_PAGER)]);
chomp(my $pager = <$fh> // '');
close($fh) or warn "`git var PAGER' error: \$?=$?";
return if $pager eq 'cat' || $pager eq '';
$new_env //= {};
$new_env->{LESS} //= 'FRX';
$new_env->{LV} //= '-c';
$new_env->{MORE} = $new_env->{LESS} if $^O eq 'freebsd';
pipe(my ($r, $wpager)) or return warn "pipe: $!";
my $rdr = { 0 => $r, 1 => $self->{1}, 2 => $self->{2} };
my $pgr = [ undef, @$rdr{1, 2} ];
my $env = $self->{env};
if ($self->{sock}) { # lei(1) process runs it
delete @$new_env{keys %$env}; # only set iff unset
send_exec_cmd($self, [ @$rdr{0..2} ], [$pager], $new_env);
} else {
die 'BUG: start_pager w/o socket';
}
$self->{1} = $wpager;
$self->{2} = $wpager if -t $self->{2};
$env->{GIT_PAGER_IN_USE} = 'true'; # we may spawn git
$self->{pgr} = $pgr;
}
# display a message for user before spawning full-screen $VISUAL
sub pgr_err {
my ($self, @msg) = @_;
return warn(@msg) unless $self->{sock} && -t $self->{2};
start_pager($self, { LESS => 'RX' }); # no 'F' so we prompt
print { $self->{2} } @msg;
$self->{2}->autoflush(1);
stop_pager($self);
send($self->{sock}, 'wait', MSG_EOR); # wait for user to quit pager
}
sub stop_pager {
my ($self) = @_;
my $pgr = delete($self->{pgr}) or return;
$self->{2} = $pgr->[2];
close(delete($self->{1})) if $self->{1};
$self->{1} = $pgr->[1];
}
sub accept_dispatch { # Listener {post_accept} callback
my ($sock) = @_; # ignore other
$sock->autoflush(1);
my $self = bless { sock => $sock }, __PACKAGE__;
vec(my $rvec = '', fileno($sock), 1) = 1;
select($rvec, undef, undef, 60) or
return send($sock, 'timed out waiting to recv FDs', MSG_EOR);
# (4096 * 33) >MAX_ARG_STRLEN
my @fds = $recv_cmd->($sock, my $buf, 4096 * 33) or return; # EOF
if (!defined($fds[0])) {
warn(my $msg = "recv_cmd failed: $!");
return send($sock, $msg, MSG_EOR);
} else {
my $i = 0;
for my $fd (@fds) {
open($self->{$i++}, '+<&=', $fd) and next;
send($sock, "open(+<&=$fd) (FD=$i): $!", MSG_EOR);
}
$i == 4 or return send($sock, 'not enough FDs='.($i-1), MSG_EOR)
}
# $ENV_STR = join('', map { "\0$_=$ENV{$_}" } keys %ENV);
# $buf = "$argc\0".join("\0", @ARGV).$ENV_STR."\0\0";
substr($buf, -2, 2, '') eq "\0\0" or # s/\0\0\z//
return send($sock, 'request command truncated', MSG_EOR);
my ($argc, @argv) = split(/\0/, $buf, -1);
undef $buf;
my %env = map { split(/=/, $_, 2) } splice(@argv, $argc);
$self->{env} = \%env;
eval { dispatch($self, @argv) };
$self->fail($@) if $@;
}
sub dclose {
my ($self) = @_;
local $current_lei = $self;
delete $self->{-progress};
_drop_wq($self) if $self->{failed};
$self->close if $self->{-event_init_done}; # PublicInbox::DS::close
}
# for long-running results
sub event_step {
my ($self) = @_;
local %ENV = %{$self->{env}};
local $current_lei = $self;
eval {
my @fds = $recv_cmd->($self->{sock}, my $buf, 4096);
if (scalar(@fds) == 1 && !defined($fds[0])) {
return if $! == EAGAIN;
die "recvmsg: $!" if $! != ECONNRESET;
@fds = (); # for open loop below:
}
for (@fds) { open my $rfh, '+<&=', $_ }
if ($buf eq '') {
_drop_wq($self); # EOF, client disconnected
dclose($self);
$buf = 'TERM';
}
if ($buf =~ /\A(?:STOP|CONT|TERM)\z/) {
my $sig = "-$buf";
for my $wq (grep(defined, @$self{@WQ_KEYS})) {
$wq->wq_kill($sig);
}
} else {
die "unrecognized client signal: $buf";
}
my $s = $self->{-socks} // []; # lei up --all
@$s = grep { send($_, $buf, MSG_EOR) } @$s;
};
if (my $err = $@) {
eval { $self->fail($err) };
dclose($self);
}
}
sub event_step_init {
my ($self) = @_;
my $sock = $self->{sock} or return;
$self->{-event_init_done} //= do { # persist til $ops done
$sock->blocking(0);
$self->SUPER::new($sock, EPOLLIN);
$sock;
};
}
sub noop {}
sub oldset { $oldset }
sub dump_and_clear_log {
if (defined($errors_log) && -s STDIN && seek(STDIN, 0, SEEK_SET)) {
openlog('lei-daemon', 'pid,nowait,nofatal,ndelay', 'user');
chomp(my @lines = );
truncate(STDIN, 0) or
syslog('warning', "ftruncate (%s): %m", $errors_log);
for my $l (@lines) { syslog('warning', '%s', $l) }
closelog(); # don't share across fork
}
}
sub cfg2lei ($) {
my ($cfg) = @_;
my $lei = bless { env => { %{$cfg->{-env}} } }, __PACKAGE__;
open($lei->{0}, '<&', \*STDIN) or die "dup 0: $!";
open($lei->{1}, '>>&', \*STDOUT) or die "dup 1: $!";
open($lei->{2}, '>>&', \*STDERR) or die "dup 2: $!";
open($lei->{3}, '<', '/') or die "open /: $!";
my ($x, $y);
socketpair($x, $y, AF_UNIX, SOCK_SEQPACKET, 0) or die "socketpair: $!";
$lei->{sock} = $x;
require PublicInbox::LeiSelfSocket;
PublicInbox::LeiSelfSocket->new($y); # adds to event loop
$lei;
}
sub dir_idle_handler ($) { # PublicInbox::DirIdle callback
my ($ev) = @_; # Linux::Inotify2::Event or duck type
my $fn = $ev->fullname;
if ($fn =~ m!\A(.+)/(new|cur)/([^/]+)\z!) { # Maildir file
my ($mdir, $nc, $bn) = ($1, $2, $3);
$nc = '' if $ev->IN_DELETE || $ev->IN_MOVED_FROM;
for my $f (keys %{$MDIR2CFGPATH->{$mdir} // {}}) {
my $cfg = $PATH2CFG{$f} // next;
eval {
my $lei = cfg2lei($cfg);
$lei->dispatch('note-event',
"maildir:$mdir", $nc, $bn, $fn);
};
warn "E: note-event $f: $@\n" if $@;
}
}
if ($ev->can('cancel') && ($ev->IN_IGNORE || $ev->IN_UNMOUNT)) {
$ev->cancel;
}
if ($fn =~ m!\A(.+)/(?:new|cur)\z! && !-e $fn) {
delete $MDIR2CFGPATH->{$1};
}
if (!-e $fn) { # config file or Maildir gone
for my $cfgpaths (values %$MDIR2CFGPATH) {
delete $cfgpaths->{$fn};
}
delete $PATH2CFG{$fn};
}
}
# lei(1) calls this when it can't connect
sub lazy_start {
my ($path, $errno, $narg) = @_;
local ($errors_log, $listener);
my ($sock_dir) = ($path =~ m!\A(.+?)/[^/]+\z!);
$errors_log = "$sock_dir/errors.log";
my $addr = pack_sockaddr_un($path);
my $lk = bless { lock_path => $errors_log }, 'PublicInbox::Lock';
umask(077) // die("umask(077): $!");
$lk->lock_acquire;
socket($listener, AF_UNIX, SOCK_SEQPACKET, 0) or die "socket: $!";
if ($errno == ECONNREFUSED || $errno == ENOENT) {
return if connect($listener, $addr); # another process won
if ($errno == ECONNREFUSED && -S $path) {
unlink($path) or die "unlink($path): $!";
}
} else {
$! = $errno; # allow interpolation to stringify in die
die "connect($path): $!";
}
bind($listener, $addr) or die "bind($path): $!";
$lk->lock_release;
undef $lk;
my @st = stat($path) or die "stat($path): $!";
my $dev_ino_expect = pack('dd', $st[0], $st[1]); # dev+ino
local $oldset = PublicInbox::DS::block_signals();
if ($narg == 5) {
$send_cmd = PublicInbox::Spawn->can('send_cmd4');
$recv_cmd = PublicInbox::Spawn->can('recv_cmd4') // do {
require PublicInbox::CmdIPC4;
$send_cmd = PublicInbox::CmdIPC4->can('send_cmd4');
PublicInbox::CmdIPC4->can('recv_cmd4');
};
}
$recv_cmd or die <<"";
(Socket::MsgHdr || Inline::C) missing/unconfigured (narg=$narg);
require PublicInbox::Listener;
require PublicInbox::PktOp;
(-p STDOUT) or die "E: stdout must be a pipe\n";
open(STDIN, '+>>', $errors_log) or die "open($errors_log): $!";
STDIN->autoflush(1);
dump_and_clear_log();
POSIX::setsid() > 0 or die "setsid: $!";
my $pid = fork // die "fork: $!";
return if $pid;
$0 = "lei-daemon $path";
local %PATH2CFG;
local $MDIR2CFGPATH;
$listener->blocking(0);
my $exit_code;
my $pil = PublicInbox::Listener->new($listener, \&accept_dispatch);
local $quit = do {
my (undef, $eof_p) = PublicInbox::PktOp->pair;
sub {
$exit_code //= shift;
eval 'PublicInbox::LeiNoteEvent::flush_task()';
my $lis = $pil or exit($exit_code);
# closing eof_p triggers \&noop wakeup
$listener = $eof_p = $pil = $path = undef;
$lis->close; # DS::close
PublicInbox::DS->SetLoopTimeout(1000);
};
};
my $sig = {
CHLD => \&PublicInbox::DS::enqueue_reap,
QUIT => $quit,
INT => $quit,
TERM => $quit,
HUP => \&noop,
USR1 => \&noop,
USR2 => \&noop,
};
require PublicInbox::DirIdle;
local $dir_idle = PublicInbox::DirIdle->new(sub {
# just rely on wakeup to hit PostLoopCallback set below
dir_idle_handler($_[0]) if $_[0]->fullname ne $path;
});
$dir_idle->add_watches([$sock_dir]);
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)) { # ENOENT is common
warn "stat($path): $!, quitting ...\n" if $! != ENOENT;
undef $path;
$quit->();
}
return 1 if defined($path);
my $n = 0;
for my $s (values %$dmap) {
$s->can('busy') or next;
if ($s->busy) {
++$n;
} else {
$s->close;
}
}
$n; # true: continue, false: stop
});
# STDIN was redirected to /dev/null above, closing STDERR and
# STDOUT will cause the calling `lei' client process to finish
# reading the <$daemon> pipe.
local $SIG{__WARN__} = sub {
$current_lei ? err($current_lei, @_) : warn(
strftime('%Y-%m-%dT%H:%M:%SZ', gmtime(time))," $$ ", @_);
};
open STDERR, '>&STDIN' or die "redirect stderr failed: $!";
open STDOUT, '>&STDIN' or die "redirect stdout failed: $!";
# $daemon pipe to `lei' closed, main loop begins:
eval { PublicInbox::DS::event_loop($sig, $oldset) };
warn "event loop error: $@\n" if $@;
# exit() may trigger waitpid via various DESTROY, ensure interruptible
PublicInbox::DS::sig_setmask($oldset);
dump_and_clear_log();
exit($exit_code // 0);
}
sub busy { 1 } # prevent daemon-shutdown if client is connected
# ensures stdout hits the FS before sock disconnects so a client
# can immediately reread it
sub DESTROY {
my ($self) = @_;
if (my $counters = delete $self->{counters}) {
for my $k (sort keys %$counters) {
my $nr = $counters->{$k};
$self->child_error(0, "$nr $k messages");
}
}
$self->{1}->autoflush(1) if $self->{1};
stop_pager($self);
dump_and_clear_log();
# preserve $? for ->fail or ->x_it code
}
sub wq_done_wait { # dwaitpid callback
my ($arg, $pid) = @_;
my ($wq, $lei) = @$arg;
local $current_lei = $lei;
my $err_type = $lei->{-err_type};
$? and $lei->child_error($?,
$err_type ? "$err_type errors during $lei->{cmd}" : ());
$lei->dclose;
}
sub fchdir {
my ($lei) = @_;
my $dh = $lei->{3} // die 'BUG: lei->{3} (CWD) gone';
chdir($dh) || die "fchdir: $!";
}
sub wq_eof { # EOF callback for main daemon
my ($lei) = @_;
local $current_lei = $lei;
delete $lei->{wq1} // return $lei->fail; # already failed
}
sub watch_state_ok ($) {
my ($state) = $_[-1]; # $_[0] may be $self
$state =~ /\Apause|(?:import|index|tag)-(?:ro|rw)\z/;
}
sub cancel_maildir_watch ($$) {
my ($d, $cfg_f) = @_;
my $w = delete $MDIR2CFGPATH->{$d}->{$cfg_f};
scalar(keys %{$MDIR2CFGPATH->{$d}}) or
delete $MDIR2CFGPATH->{$d};
for my $x (@{$w // []}) { $x->cancel }
}
sub add_maildir_watch ($$) {
my ($d, $cfg_f) = @_;
if (!exists($MDIR2CFGPATH->{$d}->{$cfg_f})) {
my @w = $dir_idle->add_watches(["$d/cur", "$d/new"], 1);
push @{$MDIR2CFGPATH->{$d}->{$cfg_f}}, @w if @w;
}
}
sub refresh_watches {
my ($lei) = @_;
$dir_idle or return;
my $cfg = _lei_cfg($lei) or return;
my $old = $cfg->{-watches};
my $watches = $cfg->{-watches} //= {};
my %seen;
my $cfg_f = $cfg->{'-f'};
for my $w (grep(/\Awatch\..+\.state\z/, keys %$cfg)) {
my $url = substr($w, length('watch.'), -length('.state'));
require PublicInbox::LeiWatch;
$watches->{$url} //= PublicInbox::LeiWatch->new($url);
$seen{$url} = undef;
my $state = $cfg->get_1("watch.$url.state");
if (!watch_state_ok($state)) {
warn("watch.$url.state=$state not supported\n");
next;
}
if ($url =~ /\Amaildir:(.+)/i) {
my $d = canonpath_harder($1);
if ($state eq 'pause') {
cancel_maildir_watch($d, $cfg_f);
} else {
add_maildir_watch($d, $cfg_f);
}
} else { # TODO: imap/nntp/jmap
$lei->child_error(0, "E: watch $url not supported, yet")
}
}
# add all known Maildir folders as implicit watches
my $lms = $lei->lms;
if ($lms) {
$lms->lms_write_prepare;
for my $d ($lms->folders('maildir:')) {
substr($d, 0, length('maildir:')) = '';
# fixup old bugs while we're iterating:
my $cd = canonpath_harder($d);
my $f = "maildir:$cd";
$lms->rename_folder("maildir:$d", $f) if $d ne $cd;
next if $watches->{$f}; # may be set to pause
require PublicInbox::LeiWatch;
$watches->{$f} = PublicInbox::LeiWatch->new($f);
$seen{$f} = undef;
add_maildir_watch($cd, $cfg_f);
}
}
if ($old) { # cull old non-existent entries
for my $url (keys %$old) {
next if exists $seen{$url};
delete $old->{$url};
if ($url =~ /\Amaildir:(.+)/i) {
my $d = canonpath_harder($1);
cancel_maildir_watch($d, $cfg_f);
} else { # TODO: imap/nntp/jmap
$lei->child_error(0, "E: watch $url TODO");
}
}
}
if (scalar keys %$watches) {
$cfg->{-env} //= { %{$lei->{env}}, PWD => '/' }; # for cfg2lei
} else {
delete $cfg->{-watches};
}
}
# TODO: support SHA-256
sub git_oid {
my $eml = $_[-1];
$eml->header_set($_) for @PublicInbox::Import::UNWANTED_HEADERS;
git_sha(1, $eml);
}
sub lms {
my ($lei, $rw) = @_;
my $sto = $lei->{sto} // _lei_store($lei) // return;
require PublicInbox::LeiMailSync;
my $f = "$sto->{priv_eidx}->{topdir}/mail_sync.sqlite3";
(-f $f || $rw) ? PublicInbox::LeiMailSync->new($f) : undef;
}
sub sto_done_request {
my ($lei, $sock) = @_;
local $current_lei = $lei;
eval {
if ($sock //= $lei->{sock}) { # issue, async wait
$lei->{sto}->wq_io_do('done', [ $sock ]);
} else { # forcibly wait
my $wait = $lei->{sto}->wq_do('done');
}
};
warn($@) if $@;
}
sub cfg_dump ($$) {
my ($lei, $f) = @_;
my $ret = eval { PublicInbox::Config->git_config_dump($f, $lei->{2}) };
return $ret if !$@;
warn($@);
undef;
}
sub request_umask {
my ($lei) = @_;
my $s = $lei->{sock} // return;
send($s, 'umask', MSG_EOR) // die "send: $!";
vec(my $rvec = '', fileno($s), 1) = 1;
select($rvec, undef, undef, 2) or die 'timeout waiting for umask';
recv($s, my $v, 5, 0) // die "recv: $!";
(my $u, $lei->{client_umask}) = unpack('AV', $v);
$u eq 'u' or warn "E: recv $v has no umask";
}
1;