1.\" -*- nroff -*- 2.\" 3.\" Copyright (c) 1996 Doug Rabson 4.\" 5.\" All rights reserved. 6.\" 7.\" This program is free software. 8.\" 9.\" Redistribution and use in source and binary forms, with or without 10.\" modification, are permitted provided that the following conditions 11.\" are met: 12.\" 1. Redistributions of source code must retain the above copyright 13.\" notice, this list of conditions and the following disclaimer. 14.\" 2. Redistributions in binary form must reproduce the above copyright 15.\" notice, this list of conditions and the following disclaimer in the 16.\" documentation and/or other materials provided with the distribution. 17.\" 18.\" THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY EXPRESS OR 19.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21.\" IN NO EVENT SHALL THE DEVELOPERS BE LIABLE FOR ANY DIRECT, INDIRECT, 22.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 23.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 27.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28.\" 29.\" $FreeBSD: src/share/man/man9/VOP_ADVLOCK.9,v 1.6.2.3 2001/12/17 11:30:18 ru Exp $ 30.\" $DragonFly: src/share/man/man9/VOP_ADVLOCK.9,v 1.3 2003/07/27 05:36:06 hmp Exp $ 31.\" 32.Dd June 30, 1999 33.Os 34.Dt VOP_ADVLOCK 9 35.Sh NAME 36.Nm VOP_ADVLOCK 37.Nd advisory record locking 38.Sh SYNOPSIS 39.In sys/param.h 40.In sys/vnode.h 41.In sys/fcntl.h 42.In sys/lockf.h 43.Ft int 44.Fn VOP_ADVLOCK "struct vnode *vp" "caddr_t id" "int op" "struct flock *fl" "int flags" 45.Sh DESCRIPTION 46The arguments are: 47.Bl -tag -width flags 48.It Fa vp 49the vnode being manipulated 50.It Fa id 51the id token which is changing the lock 52.It Fa op 53the operation to perform (see 54.Xr fcntl 2 ) 55.It Fa fl 56description of the lock 57.It Fa flags 58One of more of the following: 59.Bl -column F_UNLCK -offset indent 60.It Dv F_RDLCK Ta "shared or read lock" 61.It Dv F_UNLCK Ta "unlock" 62.It Dv F_WRLCK Ta "exclusive or write lock" 63.It Dv F_WAIT Ta "Wait until lock is granted" 64.It Dv F_FLOCK Ta Use 65.Xr flock 2 66semantics for lock 67.It Dv F_POSIX Ta "Use POSIX semantics for lock" 68.El 69.El 70.Pp 71This entry point manipulates advisory record locks on the file. Most 72filesystems delegate the work for this call to 73.Fn lf_advlock . 74.Sh RETURN VALUES 75Zero is returned on success, otherwise an error is returned. 76.Sh SEE ALSO 77.Xr fcntl 2 , 78.Xr flock 2 , 79.Xr vnode 9 80.Sh AUTHORS 81This man page was written by 82.An Doug Rabson . 83