1.\" 2.\" Copyright (C) 2001 Chad David <davidc@acns.ab.ca>. All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice(s), this list of conditions and the following disclaimer as 9.\" the first lines of this file unmodified other than the possible 10.\" addition of one or more copyright notices. 11.\" 2. Redistributions in binary form must reproduce the above copyright 12.\" notice(s), this list of conditions and the following disclaimer in the 13.\" documentation and/or other materials provided with the distribution. 14.\" 15.\" THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``AS IS'' AND ANY 16.\" EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 17.\" WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 18.\" DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) BE LIABLE FOR ANY 19.\" DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 20.\" (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 21.\" SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 22.\" CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH 25.\" DAMAGE. 26.\" 27.\" $FreeBSD$ 28.\" 29.Dd July 9, 2001 30.Dt VN_ISDISK 9 31.Os 32.Sh NAME 33.Nm vn_isdisk 34.Nd "checks if a vnode represents a disk" 35.Sh SYNOPSIS 36.In sys/param.h 37.In sys/vnode.h 38.Ft int 39.Fn vn_isdisk "struct vnode *vp" "int *errp" 40.Sh DESCRIPTION 41The 42.Fn vn_isdisk 43function checks to see if 44.Fa vp 45represents a disk. 46In order for 47.Fa vp 48to be a disk, 49it must be a character device, 50.Va v_rdev 51must be valid, and the 52.Vt cdevsw 53entry's 54.Va flags 55must have 56.Dv D_DISK 57set. 58.Pp 59Its arguments are: 60.Bl -tag -width ".Fa errp" 61.It Fa vp 62The vnode to check. 63.It Fa errp 64An integer pointer to store the error number in if the call fails. 65.El 66.Sh RETURN VALUES 67If the vnode represents a disk, 1 is returned; otherwise, 0 68is returned and 69.Fa errp 70will contain the error number. 71.Sh AUTHORS 72This manual page was written by 73.An Chad David Aq Mt davidc@acns.ab.ca . 74