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.\" $OpenBSD: opendev.3,v 1.6 1999/05/27 16:21:00 aaron Exp $
.\"
.\" Copyright (c) 1996, Jason Downs. 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, this list of conditions and the following disclaimer.
.\" 2. Redistributions in binary form must reproduce the above copyright
.\" notice, 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 AUTHOR(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 AUTHOR(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.
.\"
.Dd June 17, 1996
.Dt OPENDEV 3
.Os OpenBSD
.Sh NAME
.Nm opendev
.Nd short form device open routine
.Sh SYNOPSIS
.Fd #include <util.h>
.Ft int
.Fn opendev "char *path" "int oflags" "int dflags" "char **realpath"
.Sh DESCRIPTION
The
.Fn opendev
function opens a device using the "short form" name. This is typically
"sd0" or "sd0c", for instance, which will be expanded to
.Pa /dev/rsd0c
on most architectures.
.Pp
The
.Ar oflags
are the same as the
.Ar flags
passed to
.Xr open 2 .
.Pp
The
.Ar dflags
are specified by
.Em OR Ns 'ing
the following values:
.Pp
.Bd -literal -offset indent -compact
OPENDEV_PART attempt to open the raw partition during expansion
OPENDEV_DRCT attempt to open the device itself during expansion
.Ed
.Pp
If
.Ar realpath
is not NULL, it is modified to point at the fully expanded device name.
.Pp
.Sh RETURN VALUES
The
.Fn opendev
return value and errors are the same as the return value and errors of
.Xr open 2 .
.Sh HISTORY
.Fn opendev
first appeared in
.Ox 1.2 .
.Sh SEE ALSO
.Xr open 2
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