UNIONFS(5)

💖 NAME 💖

okay bestie, this is the unionfs(5) page — yes, the File Formats Manual one — and the name is literally unionfs — UNION FS. that's the whole title vibe. 💅

✨ SYNOPSIS ✨

So you wanna compile this driver into the kernel? slay — put these lines in your kernel configuration file:

option UNIONFS

Alternatively, to load the driver as a module at boot time, put this line in loader.conf(5):

unionfs_load="YES"

🦋 DESCRIPTION 🦋

The UNIONFS driver is an implementation of a stackable unification filesystem. that's the tea. no cap, it's literally a stackable unification filesystem implementation, periodt.

🎀 SEE ALSO 🎀

• mount_unionfs(8) — the referenced manual page, go look. 🫶

🌸 STANDARDS 🌸

these are the academic receipts, bestie:

• J. S. Pendry and M. K. McKusick, Union mounts in 4.4BSD-Lite, Proceedings of the USENIX Technical Conference on UNIX and Advanced Computing Systems, December 1995.
• P. H. Kamp and R. N. M. Watson, Jails: Confining the omnipotent root, Proceedings of the Second International System Administration and Networking Conference (SANE2000), May 2000.

💅 HISTORY 💅

The unionfs device driver first appeared in FreeBSD 5.0. history era ✨

👑 AUTHORS 👑

• The unionfs device driver was written by Jan-Simon Pendry for 4.4BSD and Masanori OZAWA <ozawa@ongs.co.jp> reimplemented the handling of the locking for FreeBSD 7.0.
• The manual page was written by Gordon Bergling <gbe@FreeBSD.org>.

🐛 BUGS 🐛

bug check, bestie: please see the mount_unionfs(8) manual page for a list of bugs regarding the unionfs filesystem. 🫶

mwah 💋 — this page’s footer says Debian, dated April 27, 2020. 🎀