update copyrights for 2018

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

diff --git a/lib/PublicInbox/SpawnPP.pm b/lib/PublicInbox/SpawnPP.pm
index fe95d1269c210efb35720fd4d24584ac3eac101c..d0df94d0ded0f4cf179a2420a274e13da062be6d 100644 (file)
--- a/lib/PublicInbox/SpawnPP.pm
+++ b/lib/PublicInbox/SpawnPP.pm
@@ -1,14 +1,23 @@
-# Copyright (C) 2016 all contributors <meta@public-inbox.org>
+# Copyright (C) 2016-2018 all contributors <meta@public-inbox.org>
 # License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
 package PublicInbox::SpawnPP;
 use strict;
 use warnings;
-use POSIX qw(dup2);
+use POSIX qw(dup2 :signal_h);
 
 # Pure Perl implementation for folks that do not use Inline::C
 sub public_inbox_fork_exec ($$$$$$) {
        my ($in, $out, $err, $f, $cmd, $env) = @_;
+       my $old = POSIX::SigSet->new();
+       my $set = POSIX::SigSet->new();
+       $set->fillset or die "fillset failed: $!";
+       sigprocmask(SIG_SETMASK, $set, $old) or die "can't block signals: $!";
+       my $syserr;
        my $pid = fork;
+       unless (defined $pid) { # compat with Inline::C version
+               $syserr = $!;
+               $pid = -1;
+       }
        if ($pid == 0) {
                if ($in != 0) {
                        dup2($in, 0) or die "dup2 failed for stdin: $!";
@@ -29,6 +38,8 @@ sub public_inbox_fork_exec ($$$$$$) {
                        die "exec $cmd->[0] failed: $!\n";
                }
        }
+       sigprocmask(SIG_SETMASK, $old) or die "can't unblock signals: $!";
+       $! = $syserr;
        $pid;
 }