.\" Copyright (c) 1996 Doug Rabson
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.\" $FreeBSD: src/share/man/man9/VOP_ACCESS.9,v 1.7.2.4 2001/12/17 11:30:18 ru Exp $
.\"
.Dd October 8, 2014
.Dt VOP_ACCESS 9
.Os
.Sh NAME
.Nm VOP_ACCESS
.Nd "check access permissions of a file or Unix domain socket"
.Sh SYNOPSIS
.In sys/param.h
.In sys/vnode.h
.Ft int
.Fn VOP_ACCESS "struct vnode *vp" "int mode" "struct ucred *cred"
.Sh DESCRIPTION
This entry point checks the access permissions of the file against the
given credentials.
.Pp
Its arguments are:
.Bl -tag -width mode
.It Ar vp
the vnode of the file to check
.It Ar mode
the type of access required
.It Ar cred
the user credentials to check
.El
.Pp
The
.Fa mode
is a mask which can contain
.Dv VREAD ,
.Dv VWRITE
or
.Dv VEXEC .
.Sh RETURN VALUES
If the file is accessible in the specified way, then zero is returned,
otherwise an appropriate error code is returned.
.Sh ERRORS
.Bl -tag -width Er
.It Bq Er EPERM
An attempt was made to change an immutable file
.It Bq Er EACCES
Permission denied
.El
.Sh SEE ALSO
.Xr vnode 9
.Sh AUTHORS
This man page was written by
.An Doug Rabson .