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.\" $DragonFly: src/share/man/man9/VOP_IOCTL.9,v 1.3 2004/06/01 11:36:53 hmp Exp $ 29.\" 30.Dd July 24, 1996 31.Os 32.Dt VOP_IOCTL 9 33.Sh NAME 34.Nm VOP_IOCTL 35.Nd device specific control 36.Sh SYNOPSIS 37.In sys/param.h 38.In sys/vnode.h 39.Ft int 40.Fn VOP_IOCTL "struct vnode *vp" "u_long command" "caddr_t data" "int fflag" "struct ucred *cred" "struct proc *p" 41.Sh DESCRIPTION 42Manipulate a file in device dependent ways. 43.Pp 44Its arguments are: 45.Bl -tag -width command 46.It Ar vp 47the vnode of the file (normally representing a device) 48.It Ar command 49the device specific operation to perform 50.It Ar cnp 51extra data for the specified operation 52.It Ar fflag 53some flags ??? 54.It Ar cred 55the caller's credentials 56.It Ar p 57the calling process 58.El 59.Pp 60Most filesystems do not implement this entry point. 61.Sh LOCKS 62The file should not be locked on entry. 63.Sh RETURN VALUES 64If successful, zero is returned, otherwise an appropriate error code. 65.Sh PSEUDOCODE 66.Bd -literal 67int 68vop_ioctl(struct vnode *vp, int command, caddr_t data, int fflag, 69 struct ucred *cred, struct proc *p) 70{ 71 return EOPNOTSUPP; 72} 73.Ed 74.Sh SEE ALSO 75.Xr vnode 9 76.Sh AUTHORS 77This man page was written by 78.An Doug Rabson . 79