82 lines
2.5 KiB
Groff
82 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 June 30, 1999
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.Os
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.Dt VOP_ADVLOCK 9
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.Sh NAME
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.Nm VOP_ADVLOCK
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.Nd advisory record locking
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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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.In sys/fcntl.h
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.In sys/lockf.h
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.Ft int
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.Fn VOP_ADVLOCK "struct vnode *vp" "caddr_t id" "int op" "struct flock *fl" "int flags"
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.Sh DESCRIPTION
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The arguments are:
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.Bl -tag -width flags
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.It Fa vp
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the vnode being manipulated
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.It Fa id
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the id token which is changing the lock
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.It Fa op
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the operation to perform (see
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.Xr fcntl 2 )
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.It Fa fl
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description of the lock
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.It Fa flags
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One of more of the following:
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.Bl -column F_UNLCK -offset indent
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.It Dv F_RDLCK Ta "shared or read lock"
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.It Dv F_UNLCK Ta "unlock"
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.It Dv F_WRLCK Ta "exclusive or write lock"
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.It Dv F_WAIT Ta "Wait until lock is granted"
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.It Dv F_FLOCK Ta Use
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.Xr flock 2
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semantics for lock
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.It Dv F_POSIX Ta "Use POSIX semantics for lock"
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.El
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.El
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.Pp
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This entry point manipulates advisory record locks on the file.
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Most file systems delegate the work for this call to
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.Fn lf_advlock .
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.Sh RETURN VALUES
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Zero is returned on success, otherwise an error is returned.
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.Sh SEE ALSO
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.Xr fcntl 2 ,
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.Xr flock 2 ,
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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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