freebsd-dev/share/man/man9/VOP_MMAP.9

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.\" -*- nroff -*-
.\"
.\" Copyright (c) 1996 Doug Rabson
.\"
.\" All rights reserved.
.\"
.\" This program is free software.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
.\" 1. Redistributions of source code must retain the above copyright
.\" notice, this list of conditions and the following disclaimer.
.\" 2. Redistributions in binary form must reproduce the above copyright
.\" notice, this list of conditions and the following disclaimer in the
.\" documentation and/or other materials provided with the distribution.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY EXPRESS OR
.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
.\" IN NO EVENT SHALL THE DEVELOPERS BE LIABLE FOR ANY DIRECT, INDIRECT,
.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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.\" $Id: VOP_MMAP.9,v 1.1 1997/03/03 18:00:27 dfr Exp $
.\"
.Dd July 24, 1996
.Os
.Dt VOP_MMAP 9
.Sh NAME
.Nm VOP_MMAP
.Nd map a file into memory
.Sh SYNOPSIS
.Fd #include <sys/param.h>
.Fd #include <sys/vnode.h>
.Ft int
.Fn VOP_MMAP "struct vnode *vp" "int fflags" "struct ucred *cred" "struct proc *p"
.Sh DESCRIPTION
Map the contents of a file into memory using the VM system.
.Pp
Its arguments are:
.Bl -tag -width fflags
.It Ar vp
the vnode of the file
.It Ar fflags
some flags ???
.It Ar cred
the caller's credentials
.It Ar p
the calling process
.El
.Pp
Most filesystems do not implement this entry point.
.Sh PSEUDOCODE
.Bd -literal
int
vop_mmap(struct vnode *vp, int fflags,
struct ucred *cred, struct proc *p)
{
return EINVAL;
}
.Ed
.Sh SEE ALSO
.Xr vnode 9
.Sh AUTHORS
This man page was written by Doug Rabson.