1.\" -*- nroff -*- 2.\" 3.\" Copyright (c) 1996 Doug Rabson 4.\" 5.\" All rights reserved. 6.\" 7.\" This program is free software. 8.\" 9.\" Redistribution and use in source and binary forms, with or without 10.\" modification, are permitted provided that the following conditions 11.\" are met: 12.\" 1. Redistributions of source code must retain the above copyright 13.\" notice, this list of conditions and the following disclaimer. 14.\" 2. Redistributions in binary form must reproduce the above copyright 15.\" notice, this list of conditions and the following disclaimer in the 16.\" documentation and/or other materials provided with the distribution. 17.\" 18.\" THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY EXPRESS OR 19.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21.\" IN NO EVENT SHALL THE DEVELOPERS BE LIABLE FOR ANY DIRECT, INDIRECT, 22.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 23.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 27.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28.\" 29.\" $FreeBSD: src/share/man/man9/VOP_IOCTL.9,v 1.5.2.1 2001/12/17 11:30:18 ru Exp $ 30.\" $DragonFly: src/share/man/man9/VOP_IOCTL.9,v 1.2 2003/06/17 04:37:01 dillon Exp $ 31.\" 32.Dd July 24, 1996 33.Os 34.Dt VOP_IOCTL 9 35.Sh NAME 36.Nm VOP_IOCTL 37.Nd device specific control 38.Sh SYNOPSIS 39.In sys/param.h 40.In sys/vnode.h 41.Ft int 42.Fn VOP_IOCTL "struct vnode *vp" "u_long command" "caddr_t data" "int fflag" "struct ucred *cred" "struct proc *p" 43.Sh DESCRIPTION 44Manipulate a file in device dependent ways. 45.Pp 46Its arguments are: 47.Bl -tag -width command 48.It Ar vp 49the vnode of the file (normally representing a device) 50.It Ar command 51the device specific operation to perform 52.It Ar cnp 53extra data for the specified operation 54.It Ar fflag 55some flags ??? 56.It Ar cred 57the caller's credentials 58.It Ar p 59the calling process 60.El 61.Pp 62Most filesystems do not implement this entry point. 63.Sh LOCKS 64The file should not be locked on entry. 65.Sh RETURN VALUES 66If successful, zero is returned, otherwise an appropriate error code. 67.Sh PSEUDOCODE 68.Bd -literal 69int 70vop_ioctl(struct vnode *vp, int command, caddr_t data, int fflag, 71 struct ucred *cred, struct proc *p) 72{ 73 return EOPNOTSUPP; 74} 75.Ed 76.Sh SEE ALSO 77.Xr vnode 9 78.Sh AUTHORS 79This man page was written by 80.An Doug Rabson . 81