1.\" Copyright (c) 1996 Doug Rabson 2.\" 3.\" All rights reserved. 4.\" 5.\" This program is free software. 6.\" 7.\" Redistribution and use in source and binary forms, with or without 8.\" modification, are permitted provided that the following conditions 9.\" are met: 10.\" 1. Redistributions of source code must retain the above copyright 11.\" notice, this list of conditions and the following disclaimer. 12.\" 2. Redistributions in binary form must reproduce the above copyright 13.\" notice, this list of conditions and the following disclaimer in the 14.\" documentation and/or other materials provided with the distribution. 15.\" 16.\" THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY EXPRESS OR 17.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19.\" IN NO EVENT SHALL THE DEVELOPERS BE LIABLE FOR ANY DIRECT, INDIRECT, 20.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26.\" 27.\" $FreeBSD: src/share/man/man9/VOP_ADVLOCK.9,v 1.6.2.3 2001/12/17 11:30:18 ru Exp $ 28.\" $DragonFly: src/share/man/man9/VOP_ADVLOCK.9,v 1.4 2004/06/01 11:36:53 hmp Exp $ 29.\" 30.Dd June 30, 1999 31.Os 32.Dt VOP_ADVLOCK 9 33.Sh NAME 34.Nm VOP_ADVLOCK 35.Nd advisory record locking 36.Sh SYNOPSIS 37.In sys/param.h 38.In sys/vnode.h 39.In sys/fcntl.h 40.In sys/lockf.h 41.Ft int 42.Fn VOP_ADVLOCK "struct vnode *vp" "caddr_t id" "int op" "struct flock *fl" "int flags" 43.Sh DESCRIPTION 44The arguments are: 45.Bl -tag -width flags 46.It Fa vp 47the vnode being manipulated 48.It Fa id 49the id token which is changing the lock 50.It Fa op 51the operation to perform (see 52.Xr fcntl 2 ) 53.It Fa fl 54description of the lock 55.It Fa flags 56One of more of the following: 57.Bl -column F_UNLCK -offset indent 58.It Dv F_RDLCK Ta "shared or read lock" 59.It Dv F_UNLCK Ta "unlock" 60.It Dv F_WRLCK Ta "exclusive or write lock" 61.It Dv F_WAIT Ta "Wait until lock is granted" 62.It Dv F_FLOCK Ta Use 63.Xr flock 2 64semantics for lock 65.It Dv F_POSIX Ta "Use POSIX semantics for lock" 66.El 67.El 68.Pp 69This entry point manipulates advisory record locks on the file. Most 70filesystems delegate the work for this call to 71.Fn lf_advlock . 72.Sh RETURN VALUES 73Zero is returned on success, otherwise an error is returned. 74.Sh SEE ALSO 75.Xr fcntl 2 , 76.Xr flock 2 , 77.Xr vnode 9 78.Sh AUTHORS 79This man page was written by 80.An Doug Rabson . 81