+SKIP: {
+ my $pid = spawn(['true'], undef, { pgid => 0 });
+ ok($pid, 'spawned process with new pgid');
+ is(waitpid($pid, 0), $pid, 'waitpid succeeds on spawned process');
+ is($?, 0, 'true exited successfully');
+ pipe(my ($r, $w)) or BAIL_OUT;
+
+ # Find invalid PID to try to join its process group.
+ my $wrong_pgid = 1;
+ for (my $i=0x7fffffff; $i >= 2; $i--) {
+ if (kill(0, $i) == 0) {
+ $wrong_pgid = $i;
+ last;
+ }
+ }
+
+ # Test spawn behavior when it can't join the requested process group.
+ $pid = eval { spawn(['true'], undef, { pgid => $wrong_pgid, 2 => $w }) };
+ close $w;
+ my $err = do { local $/; <$r> };
+ # diag "$err ($@)";
+ if (defined $pid) {
+ waitpid($pid, 0) if defined $pid;
+ isnt($?, 0, 'child error (pure-Perl)');
+ } else {
+ ok($@, 'exception raised');
+ }
+}
+