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/share/man/man9/device_find_child.9

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 3.\" Copyright (c) 1998 Doug Rabson
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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 .