1.\" $OpenBSD: dev_mkdb.8,v 1.8 2015/11/30 17:03:05 jmc Exp $ 2.\" 3.\" Copyright (c) 1990, 1993 4.\" The Regents of the University of California. All rights reserved. 5.\" 6.\" Redistribution and use in source and binary forms, with or without 7.\" modification, are permitted provided that the following conditions 8.\" are met: 9.\" 1. Redistributions of source code must retain the above copyright 10.\" notice, this list of conditions and the following disclaimer. 11.\" 2. Redistributions in binary form must reproduce the above copyright 12.\" notice, this list of conditions and the following disclaimer in the 13.\" documentation and/or other materials provided with the distribution. 14.\" 3. Neither the name of the University nor the names of its contributors 15.\" may be used to endorse or promote products derived from this software 16.\" without specific prior written permission. 17.\" 18.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 19.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 22.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28.\" SUCH DAMAGE. 29.\" 30.\" from: @(#)dev_mkdb.8 8.1 (Berkeley) 6/6/93 31.\" 32.Dd $Mdocdate: November 30 2015 $ 33.Dt DEV_MKDB 8 34.Os 35.Sh NAME 36.Nm dev_mkdb 37.Nd create /dev database 38.Sh SYNOPSIS 39.Nm dev_mkdb 40.Sh DESCRIPTION 41The 42.Nm 43command creates a 44.Xr hash 3 45access method Berkeley database in 46.Dq Pa /var/run/dev.db 47which contains the names of all of the character and block special 48files in the 49.Dq Pa /dev 50directory, using the file type and the 51.Va st_rdev 52field as the key. 53.Pp 54Keys are a structure containing a 55.Tn mode_t 56followed by a 57.Tn dev_t , 58with any padding zeroed out. 59The former is the type of the file 60.Pq st_mode & S_IFMT , 61the latter is the 62.Va st_rdev 63field. 64.Sh FILES 65.Bl -tag -width /var/run/dev.db -compact 66.It Pa /dev 67device directory 68.It Pa /var/run/dev.db 69database file 70.El 71.Sh SEE ALSO 72.Xr ps 1 , 73.Xr stat 2 , 74.Xr dbopen 3 , 75.Xr devname 3 , 76.Xr kvm_nlist 3 , 77.Xr ttyname 3 , 78.Xr kvm_mkdb 8 79.Sh HISTORY 80The 81.Nm 82command appeared in 83.Bx 4.4 . 84