-# Copyright (C) 2018-2019 all contributors <meta@public-inbox.org>
+# Copyright (C) all contributors <meta@public-inbox.org>
# License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
package PublicInbox::Xapcmd;
use strict;
-use warnings;
-use PublicInbox::Spawn qw(which spawn);
+use PublicInbox::Spawn qw(which popen_rd);
+use PublicInbox::Syscall;
+use PublicInbox::Admin qw(setup_signals);
use PublicInbox::Over;
-use PublicInbox::Search;
-use File::Temp qw(tempdir);
+use PublicInbox::SearchIdx;
+use File::Temp 0.19 (); # ->newdir
use File::Path qw(remove_tree);
-use File::Basename qw(dirname);
+use POSIX qw(WNOHANG _exit);
# support testing with dev versions of Xapian which installs
# commands with a version number suffix (e.g. "xapian-compact-1.5")
our $XAPIAN_COMPACT = $ENV{XAPIAN_COMPACT} || 'xapian-compact';
our @COMPACT_OPT = qw(jobs|j=i quiet|q blocksize|b=s no-full|n fuller|F);
-sub commit_changes ($$$) {
- my ($ibx, $tmp, $opt) = @_;
-
- my $reindex = $opt->{reindex};
- my $im = $ibx->importer(0);
- $im->lock_acquire if !$opt->{-coarse_lock};
+sub commit_changes ($$$$) {
+ my ($ibx, $im, $tmp, $opt) = @_;
+ my $reshard = $opt->{reshard};
$SIG{INT} or die 'BUG: $SIG{INT} not handled';
+ my (@old_shard, $over_chg);
+
+ # Sort shards highest-to-lowest, since ->xdb_shards_flat
+ # determines the number of shards to load based on the max;
+ # and we'd rather xdb_shards_flat to momentarily fail rather
+ # than load out-of-date shards
+ my @order = sort {
+ my ($x) = ($a =~ m!/([0-9]+)/*\z!);
+ my ($y) = ($b =~ m!/([0-9]+)/*\z!);
+ ($y // -1) <=> ($x // -1) # we may have non-shards
+ } keys %$tmp;
+
+ my ($dname) = ($order[0] =~ m!(.*/)[^/]+/*\z!);
+ my $mode = (stat($dname))[2];
+ for my $old (@order) {
+ next if $old eq ''; # no invalid paths
+ my $newdir = $tmp->{$old};
+ my $have_old = -e $old;
+ if (!$have_old && !defined($opt->{reshard})) {
+ die "failed to stat($old): $!";
+ }
- while (my ($old, $new) = each %$tmp) {
- my @st = stat($old) or die "failed to stat($old): $!\n";
-
+ my $new = $newdir->dirname if defined($newdir);
my $over = "$old/over.sqlite3";
if (-f $over) { # only for v1, v2 over is untouched
+ defined $new or die "BUG: $over exists when culling v2";
$over = PublicInbox::Over->new($over);
my $tmp_over = "$new/over.sqlite3";
- $over->connect->sqlite_backup_to_file($tmp_over);
+ $over->dbh->sqlite_backup_to_file($tmp_over);
$over = undef;
+ $over_chg = 1;
+ }
+
+ if (!defined($new)) { # culled shard
+ push @old_shard, $old;
+ next;
}
- chmod($st[2] & 07777, $new) or die "chmod $old: $!\n";
- # Xtmpdir->DESTROY won't remove $new after this:
- rename($old, "$new/old") or die "rename $old => $new/old: $!\n";
+ chmod($mode & 07777, $new) or die "chmod($new): $!\n";
+ if ($have_old) {
+ rename($old, "$new/old") or
+ die "rename $old => $new/old: $!\n";
+ }
rename($new, $old) or die "rename $new => $old: $!\n";
- my $prev = "$old/old";
- remove_tree($prev) or die "failed to remove $prev: $!\n";
+ push @old_shard, "$old/old" if $have_old;
}
- $tmp->done;
+
+ # trigger ->check_inodes in read-only daemons
+ syswrite($im->{lockfh}, '.') if $over_chg && $im;
+
+ remove_tree(@old_shard);
+ $tmp = undef;
if (!$opt->{-coarse_lock}) {
$opt->{-skip_lock} = 1;
- PublicInbox::Admin::index_inbox($ibx, $opt);
- # implicit lock_release
- } else {
- $im->lock_release;
+ $im //= $ibx if $ibx->can('eidx_sync');
+ if ($im->can('count_shards')) { # v2w or eidx
+ my $pr = $opt->{-progress};
+ my $n = $im->count_shards;
+ if (defined $reshard && $n != $reshard) {
+ die
+"BUG: counted $n shards after resharding to $reshard";
+ }
+ my $prev = $im->{shards};
+ if ($pr && $prev != $n) {
+ $pr->("shard count changed: $prev => $n\n");
+ $im->{shards} = $n;
+ }
+ }
+ my $env = $opt->{-idx_env};
+ local %ENV = (%ENV, %$env) if $env;
+ if ($ibx->can('eidx_sync')) {
+ $ibx->eidx_sync($opt);
+ } else {
+ PublicInbox::Admin::index_inbox($ibx, $im, $opt);
+ }
}
}
sub cb_spawn {
my ($cb, $args, $opt) = @_; # $cb = cpdb() or compact()
- defined(my $pid = fork) or die "fork: $!";
+ my $seed = rand(0xffffffff);
+ my $pid = fork // die "fork: $!";
return $pid if $pid > 0;
+ srand($seed);
+ $SIG{__DIE__} = sub { warn @_; _exit(1) }; # don't jump up stack
$cb->($args, $opt);
- exit 0;
+ _exit(0);
}
sub runnable_or_die ($) {
}
sub prepare_reindex ($$) {
- my ($ibx, $reindex) = @_;
- if ($ibx->{version} == 1) {
+ my ($ibx, $opt) = @_;
+ if ($ibx->can('eidx_sync')) { # no prep needed for ExtSearchIdx
+ } elsif ($ibx->version == 1) {
my $dir = $ibx->search->xdir(1);
- my $xdb = Search::Xapian::Database->new($dir);
+ my $xdb = $PublicInbox::Search::X{Database}->new($dir);
if (my $lc = $xdb->get_metadata('last_commit')) {
- $reindex->{from} = $lc;
+ $opt->{reindex}->{from} = $lc;
}
} else { # v2
- my $v2w = $ibx->importer(0);
- my $max;
- $v2w->git_dir_latest(\$max) or return;
- my $from = $reindex->{from};
+ my $max = $ibx->max_git_epoch // return;
+ my $from = $opt->{reindex}->{from};
my $mm = $ibx->mm;
my $v = PublicInbox::Search::SCHEMA_VERSION();
foreach my $i (0..$max) {
die "$x and $y reside on different filesystems\n";
}
+sub kill_pids {
+ my ($sig, $pids) = @_;
+ kill($sig, keys %$pids); # pids may be empty
+}
+
sub process_queue {
- my ($queue, $cb, $max, $opt) = @_;
+ my ($queue, $cb, $opt) = @_;
+ my $max = $opt->{jobs} // scalar(@$queue);
if ($max <= 1) {
while (defined(my $args = shift @$queue)) {
$cb->($args, $opt);
# run in parallel:
my %pids;
+ local @SIG{keys %SIG} = values %SIG;
+ setup_signals(\&kill_pids, \%pids);
while (@$queue) {
while (scalar(keys(%pids)) < $max && scalar(@$queue)) {
my $args = shift @$queue;
$pids{cb_spawn($cb, $args, $opt)} = $args;
}
+ my $flags = 0;
while (scalar keys %pids) {
- my $pid = waitpid(-1, 0);
+ my $pid = waitpid(-1, $flags) or last;
+ last if $pid < 0;
my $args = delete $pids{$pid};
- die join(' ', @$args)." failed: $?\n" if $?;
+ if ($args) {
+ die join(' ', @$args)." failed: $?\n" if $?;
+ } else {
+ warn "unknown PID($pid) reaped: $?\n";
+ }
+ $flags = WNOHANG if scalar(@$queue);
}
}
}
-sub run {
- my ($ibx, $task, $opt) = @_; # task = 'cpdb' or 'compact'
- my $cb = \&${\"PublicInbox::Xapcmd::$task"};
- PublicInbox::Admin::progress_prepare($opt ||= {});
- my $dir = $ibx->{mainrepo} or die "no mainrepo in inbox\n";
- runnable_or_die($XAPIAN_COMPACT) if $opt->{compact};
- my $reindex; # v1:{ from => $x40 }, v2:{ from => [ $x40, $x40, .. ] } }
- my $from; # per-epoch ranges
-
- if (!$opt->{-coarse_lock}) {
- $reindex = $opt->{reindex} = {};
- $from = $reindex->{from} = [];
- require Search::Xapian::WritableDatabase;
+sub prepare_run {
+ my ($ibx, $opt) = @_;
+ my $tmp = {}; # old shard dir => File::Temp->newdir object or undef
+ my @queue; # ([old//src,newdir]) - list of args for cpdb() or compact()
+ my ($old, $misc_ok);
+ if ($ibx->can('eidx_sync')) {
+ $misc_ok = 1;
+ $old = $ibx->xdir(1);
+ } elsif (my $srch = $ibx->search) {
+ $old = $srch->xdir(1);
+ }
+ if (defined $old) {
+ -d $old or die "$old does not exist\n";
+ }
+ my $reshard = $opt->{reshard};
+ if (defined $reshard && $reshard <= 0) {
+ die "--reshard must be a positive number\n";
}
-
- $ibx->umask_prepare;
- my $old = $ibx->search->xdir(1);
- -d $old or die "$old does not exist\n";
-
- my $tmp = PublicInbox::Xtmpdirs->new;
- my $v = $ibx->{version} ||= 1;
- my @q;
# we want temporary directories to be as deep as possible,
- # so v2 partitions can keep "xap$SCHEMA_VERSION" on a separate FS.
- if ($v == 1) {
- my $old_parent = dirname($old);
- same_fs_or_die($old_parent, $old);
+ # so v2 shards can keep "xap$SCHEMA_VERSION" on a separate FS.
+ if (defined($old) && $ibx->can('version') && $ibx->version == 1) {
+ if (defined $reshard) {
+ warn
+"--reshard=$reshard ignored for v1 $ibx->{inboxdir}\n";
+ }
+ my ($dir) = ($old =~ m!(.*?/)[^/]+/*\z!);
+ same_fs_or_die($dir, $old);
my $v = PublicInbox::Search::SCHEMA_VERSION();
- $tmp->{$old} = tempdir("xapian$v-XXXXXXXX", DIR => $old_parent);
- push @q, [ $old, $tmp->{$old} ];
- } else {
+ my $wip = File::Temp->newdir("xapian$v-XXXX", DIR => $dir);
+ $tmp->{$old} = $wip;
+ PublicInbox::Syscall::nodatacow_dir($wip->dirname);
+ push @queue, [ $old, $wip ];
+ } elsif (defined $old) {
opendir my $dh, $old or die "Failed to opendir $old: $!\n";
+ my @old_shards;
while (defined(my $dn = readdir($dh))) {
if ($dn =~ /\A[0-9]+\z/) {
- my $tmpl = "$dn-XXXXXXXX";
- my $dst = tempdir($tmpl, DIR => $old);
- same_fs_or_die($old, $dst);
- my $cur = "$old/$dn";
- push @q, [ $cur, $dst ];
- $tmp->{$cur} = $dst;
+ push @old_shards, $dn;
} elsif ($dn eq '.' || $dn eq '..') {
} elsif ($dn =~ /\Aover\.sqlite3/) {
+ } elsif ($dn eq 'misc' && $misc_ok) {
} else {
warn "W: skipping unknown dir: $old/$dn\n"
}
}
- die "No Xapian parts found in $old\n" unless @q;
- }
- my $im = $ibx->importer(0);
- my $max = $opt->{jobs} || scalar(@q);
- $ibx->with_umask(sub {
- $im->lock_acquire;
-
- # fine-grained locking if we prepare for reindex
- if (!$opt->{-coarse_lock}) {
- prepare_reindex($ibx, $reindex);
- $im->lock_release;
+ die "No Xapian shards found in $old\n" unless @old_shards;
+
+ my ($src, $max_shard);
+ if (!defined($reshard) || $reshard == scalar(@old_shards)) {
+ # 1:1 copy
+ $max_shard = scalar(@old_shards) - 1;
+ } else {
+ # M:N copy
+ $max_shard = $reshard - 1;
+ $src = [ map { "$old/$_" } @old_shards ];
}
+ foreach my $dn (0..$max_shard) {
+ my $wip = File::Temp->newdir("$dn-XXXX", DIR => $old);
+ same_fs_or_die($old, $wip->dirname);
+ my $cur = "$old/$dn";
+ push @queue, [ $src // $cur , $wip ];
+ PublicInbox::Syscall::nodatacow_dir($wip->dirname);
+ $tmp->{$cur} = $wip;
+ }
+ # mark old shards to be unlinked
+ if ($src) {
+ $tmp->{$_} ||= undef for @$src;
+ }
+ }
+ ($tmp, \@queue);
+}
+
+sub check_compact () { runnable_or_die($XAPIAN_COMPACT) }
+
+sub _run { # with_umask callback
+ my ($ibx, $cb, $opt) = @_;
+ my $im = $ibx->can('importer') ? $ibx->importer(0) : undef;
+ ($im // $ibx)->lock_acquire;
+ my ($tmp, $queue) = prepare_run($ibx, $opt);
+
+ # fine-grained locking if we prepare for reindex
+ if (!$opt->{-coarse_lock}) {
+ prepare_reindex($ibx, $opt);
+ ($im // $ibx)->lock_release;
+ }
+
+ $ibx->cleanup if $ibx->can('cleanup');
+ process_queue($queue, $cb, $opt);
+ ($im // $ibx)->lock_acquire if !$opt->{-coarse_lock};
+ commit_changes($ibx, $im, $tmp, $opt);
+}
+
+sub run {
+ my ($ibx, $task, $opt) = @_; # task = 'cpdb' or 'compact'
+ my $cb = \&$task;
+ PublicInbox::Admin::progress_prepare($opt ||= {});
+ my $dir;
+ for my $fld (qw(inboxdir topdir)) {
+ my $d = $ibx->{$fld} // next;
+ -d $d or die "$fld=$d does not exist\n";
+ $dir = $d;
+ last;
+ }
+ check_compact() if $opt->{compact} && $ibx->search;
+
+ if (!$ibx->can('eidx_sync') && !$opt->{-coarse_lock}) {
+ # per-epoch ranges for v2
+ # v1:{ from => $OID }, v2:{ from => [ $OID, $OID, $OID ] } }
+ $opt->{reindex} = { from => $ibx->version == 1 ? '' : [] };
+ PublicInbox::SearchIdx::load_xapian_writable();
+ }
- delete($ibx->{$_}) for (qw(mm over search)); # cleanup
- process_queue(\@q, $cb, $max, $opt);
- commit_changes($ibx, $tmp, $opt);
- });
+ local @SIG{keys %SIG} = values %SIG;
+ setup_signals();
+ $ibx->with_umask(\&_run, $ibx, $cb, $opt);
}
sub cpdb_retryable ($$) {
my ($src, $pfx) = @_;
- if (ref($@) eq 'Search::Xapian::DatabaseModifiedError') {
+ if (ref($@) =~ /\bDatabaseModifiedError\b/) {
warn "$pfx Xapian DB modified, reopening and retrying\n";
$src->reopen;
return 1;
}
sub progress_pfx ($) {
- my ($wip) = @_; # tempdir v2: ([0-9])+-XXXXXXXX
+ my ($wip) = @_; # tempdir v2: ([0-9])+-XXXX
my @p = split('/', $wip);
# return "xap15/0" for v2, or "xapian15" for v1:
($p[-1] =~ /\A([0-9]+)/) ? "$p[-2]/$1" : $p[-1];
}
+sub kill_compact { # setup_signals callback
+ my ($sig, $pidref) = @_;
+ kill($sig, $$pidref) if defined($$pidref);
+}
+
# xapian-compact wrapper
-sub compact ($$) {
+sub compact ($$) { # cb_spawn callback
my ($args, $opt) = @_;
- my ($src, $dst) = @$args;
- my ($r, $w);
+ my ($src, $newdir) = @$args;
+ my $dst = ref($newdir) ? $newdir->dirname : $newdir;
my $pfx = $opt->{-progress_pfx} ||= progress_pfx($src);
my $pr = $opt->{-progress};
my $rdr = {};
defined(my $dfd = $opt->{$fd}) or next;
$rdr->{$fd} = $dfd;
}
- $rdr->{1} = fileno($w) if $pr && pipe($r, $w);
# we rely on --no-renumber to keep docids synched to NNTP
my $cmd = [ $XAPIAN_COMPACT, '--no-renumber' ];
}
$pr->("$pfx `".join(' ', @$cmd)."'\n") if $pr;
push @$cmd, $src, $dst;
- my $pid = spawn($cmd, undef, $rdr);
- if ($pr) {
- close $w or die "close: \$w: $!";
- foreach (<$r>) {
+ my ($rd, $pid);
+ local @SIG{keys %SIG} = values %SIG;
+ setup_signals(\&kill_compact, \$pid);
+ ($rd, $pid) = popen_rd($cmd, undef, $rdr);
+ while (<$rd>) {
+ if ($pr) {
s/\r/\r$pfx /g;
$pr->("$pfx $_");
}
}
- my $rp = waitpid($pid, 0);
- if ($? || $rp != $pid) {
- die join(' ', @$cmd)." failed: $? (pid=$pid, reaped=$rp)\n";
+ waitpid($pid, 0);
+ die "@$cmd failed: \$?=$?\n" if $?;
+}
+
+sub cpdb_loop ($$$;$$) {
+ my ($src, $dst, $pr_data, $cur_shard, $reshard) = @_;
+ my ($pr, $fmt, $nr, $pfx);
+ if ($pr_data) {
+ $pr = $pr_data->{pr};
+ $fmt = $pr_data->{fmt};
+ $nr = \($pr_data->{nr});
+ $pfx = $pr_data->{pfx};
}
+
+ my ($it, $end);
+ do {
+ eval {
+ $it = $src->postlist_begin('');
+ $end = $src->postlist_end('');
+ };
+ } while (cpdb_retryable($src, $pfx));
+
+ do {
+ eval {
+ for (; $it != $end; $it++) {
+ my $docid = $it->get_docid;
+ if (defined $reshard) {
+ my $dst_shard = $docid % $reshard;
+ next if $dst_shard != $cur_shard;
+ }
+ my $doc = $src->get_document($docid);
+ $dst->replace_document($docid, $doc);
+ if ($pr_data && !(++$$nr & 1023)) {
+ $pr->(sprintf($fmt, $$nr));
+ }
+ }
+
+ # unlike copydatabase(1), we don't copy spelling
+ # and synonym data (or other user metadata) since
+ # the Perl APIs don't expose iterators for them
+ # (and public-inbox does not use those features)
+ };
+ } while (cpdb_retryable($src, $pfx));
}
# Like copydatabase(1), this is horribly slow; and it doesn't seem due
# to the overhead of Perl.
-sub cpdb ($$) {
+sub cpdb ($$) { # cb_spawn callback
my ($args, $opt) = @_;
- my ($old, $new) = @$args;
- my $src = Search::Xapian::Database->new($old);
- my ($xtmp, $tmp);
+ my ($old, $newdir) = @$args;
+ my $new = $newdir->dirname;
+ my ($src, $cur_shard);
+ my $reshard;
+ PublicInbox::SearchIdx::load_xapian_writable();
+ my $XapianDatabase = $PublicInbox::Search::X{Database};
+ if (ref($old) eq 'ARRAY') {
+ ($cur_shard) = ($new =~ m!(?:xap|ei)[0-9]+/([0-9]+)\b!);
+ defined $cur_shard or
+ die "BUG: could not extract shard # from $new";
+ $reshard = $opt->{reshard};
+ defined $reshard or die 'BUG: got array src w/o --reshard';
+
+ # resharding, M:N copy means have full read access
+ foreach (@$old) {
+ if ($src) {
+ my $sub = $XapianDatabase->new($_);
+ $src->add_database($sub);
+ } else {
+ $src = $XapianDatabase->new($_);
+ }
+ }
+ } else {
+ $src = $XapianDatabase->new($old);
+ }
+
+ my ($tmp, $ft);
+ local @SIG{keys %SIG} = values %SIG;
if ($opt->{compact}) {
- my $newdir = dirname($new);
- same_fs_or_die($newdir, $new);
- $tmp = tempdir("$new.compact-XXXXXX", DIR => $newdir);
- $xtmp = PublicInbox::Xtmpdirs->new;
- $xtmp->{$new} = $tmp;
+ my ($dir) = ($new =~ m!(.*?/)[^/]+/*\z!);
+ same_fs_or_die($dir, $new);
+ $ft = File::Temp->newdir("$new.compact-XXXX", DIR => $dir);
+ setup_signals();
+ $tmp = $ft->dirname;
+ PublicInbox::Syscall::nodatacow_dir($tmp);
} else {
$tmp = $new;
}
# like copydatabase(1), be sure we don't overwrite anything in case
# of other bugs:
- my $creat = Search::Xapian::DB_CREATE();
- my $dst = Search::Xapian::WritableDatabase->new($tmp, $creat);
- my ($it, $end);
- my ($nr, $tot, $fmt); # progress output
+ my $flag = eval($PublicInbox::Search::Xap.'::DB_CREATE()');
+ die if $@;
+ my $XapianWritableDatabase = $PublicInbox::Search::X{WritableDatabase};
+ $flag |= $PublicInbox::SearchIdx::DB_NO_SYNC if !$opt->{fsync};
+ my $dst = $XapianWritableDatabase->new($tmp, $flag);
my $pr = $opt->{-progress};
my $pfx = $opt->{-progress_pfx} = progress_pfx($new);
+ my $pr_data = { pr => $pr, pfx => $pfx, nr => 0 } if $pr;
do {
eval {
my $lc = $src->get_metadata('last_commit');
$dst->set_metadata('last_commit', $lc) if $lc;
- # only the first xapian partition (0) gets 'indexlevel'
+ # only the first xapian shard (0) gets 'indexlevel'
if ($new =~ m!(?:xapian[0-9]+|xap[0-9]+/0)\b!) {
my $l = $src->get_metadata('indexlevel');
if ($l eq 'medium') {
$dst->set_metadata('indexlevel', $l);
}
}
-
- $it = $src->postlist_begin('');
- $end = $src->postlist_end('');
- if ($pr) {
- $nr = 0;
- $tot = $src->get_doccount;
- $fmt = "$pfx % ".length($tot)."u/$tot\n";
- $pr->("$pfx copying $tot documents\n");
- }
- };
- } while (cpdb_retryable($src, $pfx));
-
- do {
- eval {
- while ($it != $end) {
- my $docid = $it->get_docid;
- my $doc = $src->get_document($docid);
- $dst->replace_document($docid, $doc);
- $it->inc;
- if ($pr && !(++$nr & 1023)) {
- $pr->(sprintf($fmt, $nr));
+ if ($pr_data) {
+ my $tot = $src->get_doccount;
+
+ # we can only estimate when resharding,
+ # because removed spam causes slight imbalance
+ my $est = '';
+ if (defined $cur_shard && $reshard > 1) {
+ $tot = int($tot/$reshard);
+ $est = 'around ';
}
+ my $fmt = "$pfx % ".length($tot)."u/$tot\n";
+ $pr->("$pfx copying $est$tot documents\n");
+ $pr_data->{fmt} = $fmt;
+ $pr_data->{total} = $tot;
}
-
- # unlike copydatabase(1), we don't copy spelling
- # and synonym data (or other user metadata) since
- # the Perl APIs don't expose iterators for them
- # (and public-inbox does not use those features)
};
} while (cpdb_retryable($src, $pfx));
- $pr->(sprintf($fmt, $nr)) if $pr;
- return unless $xtmp;
+ if (defined $reshard) {
+ # we rely on document IDs matching NNTP article number,
+ # so we can't have the Xapian sharding DB support rewriting
+ # document IDs. Thus we iterate through each shard
+ # individually.
+ $src = undef;
+ foreach (@$old) {
+ my $old = $XapianDatabase->new($_);
+ cpdb_loop($old, $dst, $pr_data, $cur_shard, $reshard);
+ }
+ } else {
+ cpdb_loop($src, $dst, $pr_data);
+ }
+
+ $pr->(sprintf($pr_data->{fmt}, $pr_data->{nr})) if $pr;
+ return unless $opt->{compact};
$src = $dst = undef; # flushes and closes
# since $dst isn't readable by HTTP or NNTP clients, yet:
compact([ $tmp, $new ], $opt);
remove_tree($tmp) or die "failed to remove $tmp: $!\n";
- $xtmp->done;
-}
-
-# slightly easier-to-manage manage than END{} blocks
-package PublicInbox::Xtmpdirs;
-use strict;
-use warnings;
-use File::Path qw(remove_tree);
-my %owner;
-
-sub new {
- # http://www.tldp.org/LDP/abs/html/exitcodes.html
- $SIG{INT} = sub { exit(130) };
- $SIG{HUP} = $SIG{PIPE} = $SIG{TERM} = sub { exit(1) };
- my $self = bless {}, $_[0]; # old partition => new (tmp) partition
- $owner{"$self"} = $$;
- $self;
-}
-
-sub done {
- my ($self) = @_;
- delete $owner{"$self"};
-
- my %known_pids;
- $known_pids{$_}++ foreach values %owner;
- if (!$known_pids{$$}) {
- $SIG{INT} = $SIG{HUP} = $SIG{PIPE} = $SIG{TERM} = 'DEFAULT';
- }
- %$self = ();
-}
-
-sub DESTROY {
- my ($self) = @_;
- my $owner_pid = delete $owner{"$self"} or return;
- return if $owner_pid != $$;
- foreach my $new (values %$self) {
- remove_tree($new) unless -d "$new/old";
- }
- done($self);
}
1;