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_ACCESS.9,v 1.7.2.4 2001/12/17 11:30:18 ru Exp $ 28.\" 29.Dd October 8, 2014 30.Dt VOP_ACCESS 9 31.Os 32.Sh NAME 33.Nm VOP_ACCESS 34.Nd "check access permissions of a file or Unix domain socket" 35.Sh SYNOPSIS 36.In sys/param.h 37.In sys/vnode.h 38.Ft int 39.Fn VOP_ACCESS "struct vnode *vp" "int mode" "struct ucred *cred" 40.Sh DESCRIPTION 41This entry point checks the access permissions of the file against the 42given credentials. 43.Pp 44Its arguments are: 45.Bl -tag -width mode 46.It Ar vp 47the vnode of the file to check 48.It Ar mode 49the type of access required 50.It Ar cred 51the user credentials to check 52.El 53.Pp 54The 55.Fa mode 56is a mask which can contain 57.Dv VREAD , 58.Dv VWRITE 59or 60.Dv VEXEC . 61.Sh RETURN VALUES 62If the file is accessible in the specified way, then zero is returned, 63otherwise an appropriate error code is returned. 64.Sh ERRORS 65.Bl -tag -width Er 66.It Bq Er EPERM 67An attempt was made to change an immutable file 68.It Bq Er EACCES 69Permission denied 70.El 71.Sh SEE ALSO 72.Xr vnode 9 73.Sh AUTHORS 74This man page was written by 75.An Doug Rabson . 76