my $psgi = "./t/httpd-corner.psgi";
my $sock = tcp_server();
+# make sure stdin is not a pipe for lsof test to check for leaking pipes
+open(STDIN, '<', '/dev/null') or die 'no /dev/null: $!';
+
# Make sure we don't clobber socket options set by systemd or similar
# using socket activation:
my ($defer_accept_val, $accf_arg);