2001-07-10 07:25:18 +00:00
|
|
|
.\"
|
|
|
|
|
.\" Copyright (C) 2001 Chad David <davidc@acns.ab.ca>. All rights reserved.
|
|
|
|
|
.\"
|
|
|
|
|
.\" Redistribution and use in source and binary forms, with or without
|
|
|
|
|
.\" modification, are permitted provided that the following conditions
|
|
|
|
|
.\" are met:
|
|
|
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
|
|
|
|
.\" notice(s), this list of conditions and the following disclaimer as
|
|
|
|
|
.\" the first lines of this file unmodified other than the possible
|
|
|
|
|
.\" addition of one or more copyright notices.
|
|
|
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
|
|
|
|
.\" notice(s), this list of conditions and the following disclaimer in the
|
|
|
|
|
.\" documentation and/or other materials provided with the distribution.
|
|
|
|
|
.\"
|
|
|
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``AS IS'' AND ANY
|
|
|
|
|
.\" EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
|
|
|
|
|
.\" WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
|
|
|
|
.\" DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) BE LIABLE FOR ANY
|
|
|
|
|
.\" DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
|
|
|
|
|
.\" (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
|
|
|
|
|
.\" SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
|
|
|
|
|
.\" CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
|
|
|
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
|
|
|
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
|
|
|
|
|
.\" DAMAGE.
|
|
|
|
|
.\"
|
|
|
|
|
.\" $FreeBSD$
|
|
|
|
|
.\"
|
|
|
|
|
.Dd July 9, 2001
|
|
|
|
|
.Dt DEVSW 9
|
|
|
|
|
.Os
|
|
|
|
|
.Sh NAME
|
|
|
|
|
.Nm devsw
|
2001-07-13 08:14:54 +00:00
|
|
|
.Nd returns the
|
|
|
|
|
.Vt cdevsw
|
|
|
|
|
structure
|
2001-07-10 07:25:18 +00:00
|
|
|
.Sh SYNOPSIS
|
2001-12-26 23:14:04 +00:00
|
|
|
.In sys/param.h
|
2001-07-11 10:31:49 +00:00
|
|
|
.In sys/conf.h
|
|
|
|
|
.Ft "struct cdevsw *"
|
2001-07-11 03:51:44 +00:00
|
|
|
.Fn devsw "dev_t dev"
|
2001-07-10 07:25:18 +00:00
|
|
|
.Sh DESCRIPTION
|
|
|
|
|
The
|
2001-07-11 10:31:49 +00:00
|
|
|
.Fn devsw
|
|
|
|
|
function returns a pointer to the
|
|
|
|
|
.Vt cdevsw
|
|
|
|
|
structure associated
|
|
|
|
|
with this character device ID.
|
|
|
|
|
If
|
|
|
|
|
.Fa dev->si_cdevsw
|
|
|
|
|
is set it is
|
2001-07-10 07:25:18 +00:00
|
|
|
returned; otherwise, the
|
2001-07-11 10:31:49 +00:00
|
|
|
.Xr major 9
|
|
|
|
|
offset into the
|
|
|
|
|
.Va cdevsw
|
|
|
|
|
array is returned.
|
2001-07-10 07:25:18 +00:00
|
|
|
.Pp
|
2001-07-11 10:31:49 +00:00
|
|
|
Its argument is:
|
2001-07-13 09:09:52 +00:00
|
|
|
.Bl -tag -width ".Fa dev"
|
2001-07-11 10:31:49 +00:00
|
|
|
.It Fa dev
|
|
|
|
|
The device whose
|
|
|
|
|
.Vt cdevsw
|
|
|
|
|
entry should be returned.
|
|
|
|
|
.El
|
2001-07-10 07:25:18 +00:00
|
|
|
.Sh RETURN VALUES
|
2001-07-11 10:31:49 +00:00
|
|
|
A pointer to a
|
|
|
|
|
.Vt cdevsw
|
|
|
|
|
structure.
|
2001-07-13 08:14:54 +00:00
|
|
|
.Sh SEE ALSO
|
|
|
|
|
.Xr major 9 ,
|
|
|
|
|
.Xr minor 9 ,
|
|
|
|
|
.Xr umajor 9 ,
|
|
|
|
|
.Xr uminor 9
|
2001-07-10 07:25:18 +00:00
|
|
|
.Sh AUTHORS
|
2001-07-11 10:31:49 +00:00
|
|
|
This man page was written by
|
2001-07-13 08:14:54 +00:00
|
|
|
.An Chad David Aq davidc@acns.ab.ca .
|
