1.\" -*- nroff -*- 2.\" 3.\" Copyright (c) 1998 Doug Rabson 4.\" 5.\" All rights reserved. 6.\" 7.\" This program is free software. 8.\" 9.\" Redistribution and use in source and binary forms, with or without 10.\" modification, are permitted provided that the following conditions 11.\" are met: 12.\" 1. Redistributions of source code must retain the above copyright 13.\" notice, this list of conditions and the following disclaimer. 14.\" 2. Redistributions in binary form must reproduce the above copyright 15.\" notice, this list of conditions and the following disclaimer in the 16.\" documentation and/or other materials provided with the distribution. 17.\" 18.\" THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY EXPRESS OR 19.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21.\" IN NO EVENT SHALL THE DEVELOPERS BE LIABLE FOR ANY DIRECT, INDIRECT, 22.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 23.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 27.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28.\" 29.\" $FreeBSD$ 30.\" 31.Dd February 8, 2005 32.Dt DEVICE_FIND_CHILD 9 33.Os 34.Sh NAME 35.Nm device_find_child 36.Nd search for a child of a device 37.Sh SYNOPSIS 38.In sys/param.h 39.In sys/bus.h 40.Ft device_t 41.Fn device_find_child "device_t dev" "const char *classname" "int unit" 42.Sh DESCRIPTION 43This function looks for a specific child of 44.Dv dev 45with the given 46.Fa classname 47and 48.Fa unit . 49If 50.Fa unit 51is \-1, it returns the first child of 52.Fa dev 53with a matching 54.Fa classname 55(that is, the one with the lowest unit). 56.Sh RETURN VALUES 57If it exists, the child device is returned, otherwise NULL. 58.Sh SEE ALSO 59.Xr device_add_child 9 60.Sh AUTHORS 61This manual page was written by 62.An Doug Rabson . 63