Jakob - you’re a star! Thanks so much, your suggestion works. So I added </dev/null to now give: ... I’m wondering if this would be something worthy of attention in openssl? Maybe open an issue to catch this. Seems like the apps could check and redirect to /dev/null if the FD isn't valid. -- openssl-users mailing list To unsubscribe: https://mta.openssl.org/mailman/listinfo/openssl-users