dev_mkdb(8)

dev_mkdb8

Create /dev database

Usage

dev_mkdb

Overview

The dev_mkdb command creates a hash(3) access method Berkeley database in “/var/run/dev.db” which contains the names of all of the character and block special files in the “/dev” directory, using the file type and the st_rdev field as the key.

Keys are a structure containing a mode_t followed by a dev_t, with any padding zeroed out. The former is the type of the file (st_mode & S_IFMT), the latter is the st_rdev field.

Files

/dev

device directory

/var/run/dev.db

database file

Releases

61 releases since OpenBSD 2.1; the text changed 6 times.

  1. 2.1–2.4
  2. 2.5
  3. 2.6–3.3
  4. 3.4–4.1
  5. 4.2–5.8
  6. 5.9–7.1
  7. 7.2–8.0

History

The dev_mkdb command appeared in 4.3BSD-Net/2.

From man 8.0-current-20261101 in OpenBSD 8.0-current (2026-11-01). Parsed by carta from the page's mdoc source.