85 lines
2.5 KiB
Groff
85 lines
2.5 KiB
Groff
.\" -*- nroff -*-
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.\"
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.\" Copyright (c) 1996 Doug Rabson
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.\"
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.\" All rights reserved.
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.\"
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.\" This program is free software.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY EXPRESS OR
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.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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.\" IN NO EVENT SHALL THE DEVELOPERS BE LIABLE FOR ANY DIRECT, INDIRECT,
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.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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.\"
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.\" $FreeBSD$
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.\"
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.Dd July 24, 1996
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.Os
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.Dt VOP_IOCTL 9
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.Sh NAME
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.Nm VOP_IOCTL
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.Nd device specific control
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.Sh SYNOPSIS
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.In sys/param.h
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.In sys/vnode.h
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.Ft int
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.Fn VOP_IOCTL "struct vnode *vp" "u_long command" "caddr_t data" "int fflag" "struct ucred *cred" "struct thread *td"
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.Sh DESCRIPTION
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Manipulate a file in device dependent ways.
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.Pp
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Its arguments are:
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.Bl -tag -width command
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.It Fa vp
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The vnode of the file (normally representing a device).
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.It Fa command
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The device specific operation to perform.
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.It Fa cnp
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Extra data for the specified operation.
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.It Fa fflag
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Some flags ???
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.It Fa cred
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The caller's credentials.
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.It Fa td
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The calling thread.
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.El
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.Pp
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Most file systems do not implement this entry point.
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.Sh LOCKS
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The file should not be locked on entry.
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.Sh RETURN VALUES
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If successful, zero is returned, otherwise an appropriate error code.
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.Pp
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If the ioctl is not recognized or not handled,
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.Er ENOTTY
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should be returned.
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.Sh PSEUDOCODE
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.Bd -literal
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int
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vop_ioctl(struct vnode *vp, int command, caddr_t data, int fflag,
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struct ucred *cred, struct thread *td)
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{
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return ENOTTY;
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}
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.Ed
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.Sh SEE ALSO
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.Xr vnode 9
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.Sh AUTHORS
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This man page was written by
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.An Doug Rabson .
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