1.\" Copyright (c) 1996 Doug Rabson 2.\" 3.\" All rights reserved. 4.\" 5.\" This program is free software. 6.\" 7.\" Redistribution and use in source and binary forms, with or without 8.\" modification, are permitted provided that the following conditions 9.\" are met: 10.\" 1. Redistributions of source code must retain the above copyright 11.\" notice, this list of conditions and the following disclaimer. 12.\" 2. Redistributions in binary form must reproduce the above copyright 13.\" notice, this list of conditions and the following disclaimer in the 14.\" documentation and/or other materials provided with the distribution. 15.\" 16.\" THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY EXPRESS OR 17.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19.\" IN NO EVENT SHALL THE DEVELOPERS BE LIABLE FOR ANY DIRECT, INDIRECT, 20.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26.\" 27.\" $FreeBSD: src/share/man/man9/VOP_IOCTL.9,v 1.5.2.1 2001/12/17 11:30:18 ru Exp $ 28.\" 29.Dd July 24, 1996 30.Dt VOP_IOCTL 9 31.Os 32.Sh NAME 33.Nm VOP_IOCTL 34.Nd device specific control 35.Sh SYNOPSIS 36.In sys/param.h 37.In sys/vnode.h 38.Ft int 39.Fn VOP_IOCTL "struct vnode *vp" "u_long command" "caddr_t data" "int fflag" "struct ucred *cred" "struct proc *p" 40.Sh DESCRIPTION 41Manipulate a file in device dependent ways. 42.Pp 43Its arguments are: 44.Bl -tag -width command 45.It Ar vp 46the vnode of the file (normally representing a device) 47.It Ar command 48the device specific operation to perform 49.It Ar cnp 50extra data for the specified operation 51.It Ar fflag 52some flags ??? 53.It Ar cred 54the caller's credentials 55.It Ar p 56the calling process 57.El 58.Pp 59Most filesystems do not implement this entry point. 60.Sh LOCKS 61The file should not be locked on entry. 62.Sh RETURN VALUES 63If successful, zero is returned, otherwise an appropriate error code. 64.Sh PSEUDOCODE 65.Bd -literal 66int 67vop_ioctl(struct vnode *vp, int command, caddr_t data, int fflag, 68 struct ucred *cred, struct proc *p) 69{ 70 return EOPNOTSUPP; 71} 72.Ed 73.Sh SEE ALSO 74.Xr vnode 9 75.Sh AUTHORS 76This man page was written by 77.An Doug Rabson . 78