index+xcpdb: improve SIG{INT,TERM,HUP,PIPE} behavior

[public-inbox.git] / lib / PublicInbox / Xapcmd.pm

diff --git a/lib/PublicInbox/Xapcmd.pm b/lib/PublicInbox/Xapcmd.pm
index 714f6859734fe20366ef1edabf38928b926835e1..348621cef0bfd724eb9366d69e9ffd05294def30 100644 (file)
--- a/lib/PublicInbox/Xapcmd.pm
+++ b/lib/PublicInbox/Xapcmd.pm
@@ -2,8 +2,8 @@
 # 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 popen_rd nodatacow_dir);
+use PublicInbox::Admin qw(setup_signals);
 use PublicInbox::Over;
 use PublicInbox::SearchIdx;
 use File::Temp 0.19 (); # ->newdir
@@ -126,6 +126,11 @@ sub same_fs_or_die ($$) {
        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, $opt) = @_;
        my $max = $opt->{jobs} // scalar(@$queue);
@@ -138,6 +143,8 @@ sub process_queue {
 
        # run in parallel:
        my %pids;
+       local %SIG = %SIG;
+       setup_signals(\&kill_pids, \%pids);
        while (@$queue) {
                while (scalar(keys(%pids)) < $max && scalar(@$queue)) {
                        my $args = shift @$queue;
@@ -156,12 +163,6 @@ sub process_queue {
        }
 }
 
-sub setup_signals () {
-       # http://www.tldp.org/LDP/abs/html/exitcodes.html
-       $SIG{INT} = sub { exit(130) };
-       $SIG{HUP} = $SIG{PIPE} = $SIG{TERM} = sub { exit(1) };
-}
-
 sub prepare_run {
        my ($ibx, $opt) = @_;
        my $tmp = {}; # old shard dir => File::Temp->newdir object or undef
@@ -294,6 +295,11 @@ sub progress_pfx ($) {
        ($p[-1] =~ /\A([0-9]+)/) ? "$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 ($$) {
        my ($args, $opt) = @_;
@@ -319,14 +325,18 @@ sub compact ($$) {
        }
        $pr->("$pfx `".join(' ', @$cmd)."'\n") if $pr;
        push @$cmd, $src, $dst;
-       my $rd = popen_rd($cmd, undef, $rdr);
+       my ($rd, $pid);
+       local %SIG = %SIG;
+       setup_signals(\&kill_compact, \$pid);
+       ($rd, $pid) = popen_rd($cmd, undef, $rdr);
        while (<$rd>) {
                if ($pr) {
                        s/\r/\r$pfx /g;
                        $pr->("$pfx $_");
                }
        }
-       close $rd or die join(' ', @$cmd)." failed: $?n";
+       waitpid($pid, 0);
+       die "@$cmd failed: \$?=$?\n" if $?;
 }
 
 sub cpdb_loop ($$$;$$) {