+{
+ my $fh = popen_rd([qw(echo hello)]);
+ ok(fileno($fh) >= 0, 'tied fileno works');
+ my $l = <$fh>;
+ is($l, "hello\n", 'tied readline works');
+ $l = <$fh>;
+ ok(!$l, 'tied readline works for EOF');
+}
+
+{
+ my $fh = popen_rd([qw(printf foo\nbar)]);
+ ok(fileno($fh) >= 0, 'tied fileno works');
+ my @line = <$fh>;
+ is_deeply(\@line, [ "foo\n", 'bar' ], 'wantarray works on readline');
+}
+
+{
+ my $fh = popen_rd([qw(echo hello)]);
+ my $buf;
+ is(sysread($fh, $buf, 6), 6, 'sysread got 6 bytes');
+ is($buf, "hello\n", 'tied gets works');
+ is(sysread($fh, $buf, 6), 0, 'sysread got EOF');
+ $? = 1;
+ close $fh;
+ is($?, 0, '$? set properly');
+}
+
+{
+ my $fh = popen_rd([qw(false)]);
+ close $fh;
+ isnt($?, 0, '$? set properly: '.$?);
+}
+
+SKIP: {
+ eval {
+ require BSD::Resource;
+ defined(BSD::Resource::RLIMIT_CPU())
+ } or skip 'BSD::Resource::RLIMIT_CPU missing', 3;
+ my ($r, $w);
+ pipe($r, $w) or die "pipe: $!";
+ my $cmd = ['sh', '-c', 'while true; do :; done'];
+ my $fd = fileno($w);
+ my $opt = { RLIMIT_CPU => [ 1, 1 ], RLIMIT_CORE => [ 0, 0 ], 1 => $fd };
+ my $pid = spawn($cmd, undef, $opt);
+ close $w or die "close(w): $!";
+ my $rset = '';
+ vec($rset, fileno($r), 1) = 1;
+ ok(select($rset, undef, undef, 5), 'child died before timeout');
+ is(waitpid($pid, 0), $pid, 'XCPU child process reaped');
+ isnt($?, 0, 'non-zero exit status');
+}
+