Projects and notes by zombocoder: open-source systems software in C, Go, Rust and Zig — a USB HSM, FreeBSD libraries, kernel filesystems, a programming language and terminal apps.https://zombocoder.com/enhttps://zombocoder.com/articles/bfc-crash-safe-container/https://zombocoder.com/articles/bfc-crash-safe-container/BFC's on-disk format puts the index at the end, opens a container from its last 56 bytes, and never rewrites what is already written. What that buys, and what it leaves visible.Wed, 07 Oct 2026 00:00:00 GMTbfchttps://zombocoder.com/articles/bfcfs-two-kernels/https://zombocoder.com/articles/bfcfs-two-kernels/The same read-only container format implemented as a Linux VFS module and a FreeBSD vnode filesystem, compared side by side.Wed, 07 Oct 2026 00:00:00 GMTbfcfs-linuxhttps://zombocoder.com/articles/freebsd-from-go-without-shelling-out/https://zombocoder.com/articles/freebsd-from-go-without-shelling-out/Seven libraries replace jail(8), ifconfig, route, ngctl, pfctl, zfs and bhyvectl with native kernel and library interfaces, and an exporter ties them together.Wed, 07 Oct 2026 00:00:00 GMTgo-freebsd-jails-exporterhttps://zombocoder.com/articles/godi-to-goboot/https://zombocoder.com/articles/godi-to-goboot/A string-keyed reflection container, then a compiler that resolves the whole dependency graph with go/types and writes the wiring as plain Go.Wed, 07 Oct 2026 00:00:00 GMTgoboothttps://zombocoder.com/articles/o2l-everything-is-an-object/https://zombocoder.com/articles/o2l-everything-is-an-object/Design notes on a small object-oriented language, covering its single-variant value model, immutable objects, and the places where purity gave way to practicality.Wed, 07 Oct 2026 00:00:00 GMTo2lhttps://zombocoder.com/articles/openhsm-audit-log/https://zombocoder.com/articles/openhsm-audit-log/How OpenHSM records every operation in a 32 KB ring on an STM32U585, chains the entries with truncated HMACs, and lets the host verify the chain.Wed, 07 Oct 2026 00:00:00 GMTopenhsmhttps://zombocoder.com/articles/openhsm-openbao-unseal/https://zombocoder.com/articles/openhsm-openbao-unseal/A tour of OpenHSM, from USB transport and secure session to key store and secure boot, and an honest list of what still stands between it and production.Wed, 07 Oct 2026 00:00:00 GMTopenhsmhttps://zombocoder.com/articles/rt-msghdr-92-vs-152/https://zombocoder.com/articles/rt-msghdr-92-vs-152/How a hand-written rt_msghdr made a whole route package silently useless, and the C-probe test that pins every ABI struct in go-freebsd-ifc now.Wed, 07 Oct 2026 00:00:00 GMTgo-freebsd-ifc