UK(4)

🦋 uk(4) — SCSI user-level driver 🦋

okay bestie, gather round, because uk(4) is lowkey niche but iconic: it's the SCSI user-level driver, and it's giving “let a process talk to the SCSI bus when nobody else is configured to handle the device.” 💅

🌸 NAME 🌸

uk — SCSI user-level driver.

✨ SYNOPSIS ✨

uk* at scsibus? target ? lun ?

💖 DESCRIPTION 💖

The uk driver provides support for a process to address devices on the SCSI bus for which there is no configured driver. No cap.

A SCSI adapter must also be separately configured into the system before this driver makes sense. Like, the adapter has to be there first, fr fr.

🎀 KERNEL CONFIGURATION 🎀

If a count is given, that number of uk devices will be configured into the NetBSD kernel. Slay.

🦋 IOCTLS 🦋

The uk driver has no ioctls of its own but rather acts as a medium for the generic scsi(4) ioctls. The way it just passes the vibe through? Obsessed.

These are described in <sys/scsiio.h>. iykyk.

🌈 FILES 🌈

• /dev/uk[0-255] — unknown SCSI devices.

💀 DIAGNOSTICS 💀

All scsi(4) debug ioctls work on uk devices. Periodt.

💜 SEE ALSO 💜

• ioctl(2)
• cd(4)
• ch(4)
• scsi(4)
• sd(4)
• ss(4)
• st(4)

⭐ HISTORY ⭐

The uk driver appeared in 386BSD 0.1. A whole legend.

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This page was brought to you by Debian, dated October 11, 1993 — cute, historic, and fully iconic. 🫶💅