X-Git-Url: http://www.git.stargrave.org/?a=blobdiff_plain;f=lib%2FPublicInbox%2FSpawnPP.pm;h=6d7e2c34ec9046111056b350084c947dbaa070e0;hb=23af251dd607c4e75ab1e68063f2c885c48cc035;hp=401cb78de083ebf294ddec7847294d849d1c1142;hpb=5244475c94d9f80b0a76b6bfa9185bdff5a8a0d8;p=public-inbox.git

diff --git a/lib/PublicInbox/SpawnPP.pm b/lib/PublicInbox/SpawnPP.pm
index 401cb78d..6d7e2c34 100644
--- a/lib/PublicInbox/SpawnPP.pm
+++ b/lib/PublicInbox/SpawnPP.pm
@@ -16,46 +16,59 @@ sub pi_fork_exec ($$$$$$$) {
 	$set->fillset or die "fillset failed: $!";
 	sigprocmask(SIG_SETMASK, $set, $old) or die "can't block signals: $!";
 	my $syserr;
+	pipe(my ($r, $w));
 	my $pid = fork;
 	unless (defined $pid) { # compat with Inline::C version
 		$syserr = $!;
 		$pid = -1;
 	}
 	if ($pid == 0) {
+		close $r;
+		$SIG{__DIE__} = sub {
+			warn(@_);
+			syswrite($w, my $num = $! + 0);
+			_exit(1);
+		};
 		for my $child_fd (0..$#$redir) {
 			my $parent_fd = $redir->[$child_fd];
 			next if $parent_fd == $child_fd;
 			dup2($parent_fd, $child_fd) or
-				die "dup2($parent_fd, $child_fd): $!\n";
+				die "dup2($parent_fd, $child_fd): $!";
 		}
 		if ($pgid >= 0 && !defined(setpgid(0, $pgid))) {
-			warn "setpgid: $!";
-			_exit(1);
+			die "setpgid(0, $pgid): $!";
+		}
+		for (keys %SIG) {
+			$SIG{$_} = 'DEFAULT' if substr($_, 0, 1) ne '_';
 		}
-		$SIG{$_} = 'DEFAULT' for keys %SIG;
 		if ($cd ne '') {
 			chdir $cd or die "chdir $cd: $!";
 		}
 		while (@$rlim) {
 			my ($r, $soft, $hard) = splice(@$rlim, 0, 3);
 			BSD::Resource::setrlimit($r, $soft, $hard) or
-			  warn "failed to set $r=[$soft,$hard]\n";
+				die "setrlimit($r=[$soft,$hard]: $!)";
 		}
 		$old->delset(POSIX::SIGCHLD) or die "delset SIGCHLD: $!";
 		sigprocmask(SIG_SETMASK, $old) or die "SETMASK: ~SIGCHLD: $!";
+		$cmd->[0] = $f;
 		if ($ENV{MOD_PERL}) {
-			exec which('env'), '-i', @$env, @$cmd;
-			die "exec env -i ... $cmd->[0] failed: $!\n";
+			@$cmd = (which('env'), '-i', @$env, @$cmd);
 		} else {
-			local %ENV = map { split(/=/, $_, 2) } @$env;
-			my @cmd = @$cmd;
-			$cmd[0] = $f;
-			exec @cmd;
-			die "exec $cmd->[0] failed: $!\n";
+			%ENV = map { split(/=/, $_, 2) } @$env;
 		}
+		undef $r;
+		exec { $f } @$cmd;
+		die "exec @$cmd failed: $!";
 	}
+	close $w;
 	sigprocmask(SIG_SETMASK, $old) or die "can't unblock signals: $!";
-	$! = $syserr;
+	if (my $cerrnum = do { local $/, <$r> }) {
+		$pid = -1;
+		$! = $cerrnum;
+	} else {
+		$! = $syserr;
+	}
 	$pid;
 }