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.Dd June 28, 2021 28.Dt VN_ISDISK 9 29.Os 30.Sh NAME 31.Nm vn_isdisk 32.Nd "checks if a vnode represents a disk" 33.Sh SYNOPSIS 34.In sys/param.h 35.In sys/vnode.h 36.Ft bool 37.Fn vn_isdisk "struct vnode *vp" 38.Ft bool 39.Fn vn_isdisk_error "struct vnode *vp" "int *errp" 40.Sh DESCRIPTION 41The 42.Fn vn_isdisk 43and 44.Fn vn_isdisk_error 45functions check to see if 46.Fa vp 47represents a disk. 48In order for 49.Fa vp 50to be a disk, 51it must be a character device, 52.Va v_rdev 53must be valid, and the 54.Vt cdevsw 55entry's 56.Va flags 57must have 58.Dv D_DISK 59set. 60.Pp 61The arguments are: 62.Bl -tag -width ".Fa errp" 63.It Fa vp 64The vnode to check. 65.It Fa errp 66An integer pointer to store the error number in if the call fails. 67.El 68.Sh RETURN VALUES 69If the vnode represents a disk, true is returned; otherwise, false 70is returned and 71.Fa errp 72will contain the error number. 73.Sh AUTHORS 74This manual page was written by 75.An Chad David Aq Mt davidc@acns.ab.ca . 76