-# 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>
+
+# Pure-Perl implementation of "spawn". This can't take advantage
+# of vfork, so no speedups under Linux for spawning from large processes.
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: $!";
die "exec $cmd->[0] failed: $!\n";
}
}
+ sigprocmask(SIG_SETMASK, $old) or die "can't unblock signals: $!";
+ $! = $syserr;
$pid;
}