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 June 28, 2021 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 bool 39.Fn vn_isdisk "struct vnode *vp" 40.Ft bool 41.Fn vn_isdisk_error "struct vnode *vp" "int *errp" 42.Sh DESCRIPTION 43The 44.Fn vn_isdisk 45and 46.Fn vn_isdisk_error 47functions check to see if 48.Fa vp 49represents a disk. 50In order for 51.Fa vp 52to be a disk, 53it must be a character device, 54.Va v_rdev 55must be valid, and the 56.Vt cdevsw 57entry's 58.Va flags 59must have 60.Dv D_DISK 61set. 62.Pp 63The arguments are: 64.Bl -tag -width ".Fa errp" 65.It Fa vp 66The vnode to check. 67.It Fa errp 68An integer pointer to store the error number in if the call fails. 69.El 70.Sh RETURN VALUES 71If the vnode represents a disk, true is returned; otherwise, false 72is returned and 73.Fa errp 74will contain the error number. 75.Sh AUTHORS 76This manual page was written by 77.An Chad David Aq Mt davidc@acns.ab.ca . 78