fab63cc413
incomplete and some are just placeholders but I wanted to try to get something at least into 2.2 on the grounds that what I have is a lot better than nothing. I also wanted to commit something which documents the interfaces in 2.2 before I start updating the documentation for 3.0. This is a definite 2.2 candidate and is also relavent to 2.1 if people still care about that branch.
78 lines
2.4 KiB
Groff
78 lines
2.4 KiB
Groff
.\" -*- 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
|
|
.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
|
.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
.\"
|
|
.\" $Id$
|
|
.\"
|
|
.Dd July 24, 1996
|
|
.Os
|
|
.Dt VOP_TRUNCATE 9
|
|
.Sh NAME
|
|
.Nm VOP_TRUNCATE
|
|
.Nd truncate a file
|
|
.Sh SYNOPSIS
|
|
.Fd #include <sys/vnode.h>
|
|
.Ft int
|
|
.Fn VOP_TRUNCATE "struct vnode *vp" "off_t length" "int flags" "struct ucred *cred" "struct proc *p"
|
|
.Sh DESCRIPTION
|
|
.Pp
|
|
The arguments are:
|
|
.Bl -tag -width length
|
|
.It Ar vp
|
|
The file to truncate.
|
|
.It Ar length
|
|
The desired new length of the file.
|
|
.It Ar flags
|
|
Flags controlling I/O.
|
|
.It Ar cred
|
|
Credentials of the caller.
|
|
.It Ar p
|
|
Current process.
|
|
.El
|
|
.Pp
|
|
The size of file
|
|
.Fa vp
|
|
is set to
|
|
.Fa length .
|
|
The file can be both truncated and extended by this call.
|
|
If
|
|
.Fa flags
|
|
contains the value
|
|
.Dv IO_SYNC
|
|
then all writes to the filesystem should complete before the call returns.
|
|
This call is used internally by the UFS filesystem as part of its
|
|
implementation of
|
|
.Xr VOP_SETATTR 9 .
|
|
.Sh RETURN VALUES
|
|
Zero is returned on success, otherwise an error is returned.
|
|
.Sh SEE ALSO
|
|
.Xr vnode 9 ,
|
|
.Xr VOP_SETATTR 9
|
|
.Sh AUTHORS
|
|
This man page was written by Doug Rabson.
|
|
|