.\" $NetBSD: vattr.9,v 1.15 2010/12/02 12:54:13 wiz Exp $ .\" .\" Copyright (c) 2001 The NetBSD Foundation, Inc. .\" All rights reserved. .\" .\" This code is derived from software contributed to The NetBSD Foundation .\" by Gregory McGarry. .\" .\" Redistribution and use in source and binary forms, with or without .\" modification, are permitted provided that the following conditions .\" are met: .\" 1. Redistributions of source code must retain the above copyright .\" notice, this list of conditions and the following disclaimer. .\" 2. Redistributions in binary form must reproduce the above copyright .\" notice, this list of conditions and the following disclaimer in the .\" documentation and/or other materials provided with the distribution. .\" .\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS .\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED .\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR .\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS .\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR .\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF .\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS .\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN .\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) .\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE .\" POSSIBILITY OF SUCH DAMAGE. .\" .Dd January 8, 2010 .Dt VATTR 9 .Os .Sh NAME .Nm vattr , .Nm vattr_null .Nd vnode attributes .Sh SYNOPSIS .In sys/param.h .In sys/vnode.h .Ft void .Fn vattr_null "struct vattr *vap" .Sh DESCRIPTION Vnode attributes describe attributes of a file or directory including file permissions, owner, group, size, access time and modification time. .Pp A vnode attribute has the following structure: .Pp .Bd -literal struct vattr { enum vtype va_type; /* vnode type (for create) */ mode_t va_mode; /* files access mode and type */ nlink_t va_nlink; /* number of references to file */ uid_t va_uid; /* owner user id */ gid_t va_gid; /* owner group id */ dev_t va_fsid; /* file system id (dev for now) */ ino_t va_fileid; /* file id */ u_quad_t va_size; /* file size in bytes */ long va_blocksize; /* blocksize preferred for i/o */ struct timespec va_atime; /* time of last access */ struct timespec va_mtime; /* time of last modification */ struct timespec va_ctime; /* time file changed */ struct timespec va_birthtime; /* time file created */ u_long va_gen; /* generation number of file */ u_long va_flags; /* flags defined for file */ dev_t va_rdev; /* device the special file represents */ u_quad_t va_bytes; /* bytes of disk space held by file */ u_quad_t va_filerev; /* file modification number */ u_int va_vaflags; /* operations flags, see below */ long va_spare; /* remain quad aligned */ }; .Ed .Pp A field value of VNOVAL represents a field whose value is unavailable or which is not to be changed. Valid flag values for .Em va_flags are: .Pp .Bl -tag -offset indent -width VA_UTIMES_NULL -compact .It VA_UTIMES_NULL utimes argument was NULL .It VA_EXCLUSIVE exclusive create request .El .Pp Vnode attributes for a file are set by the vnode operation .Xr VOP_SETATTR 9 . Vnode attributes for a file are retrieved by the vnode operation .Xr VOP_GETATTR 9 . For more information on vnode operations see .Xr vnodeops 9 . .Sh FUNCTIONS .Bl -tag -width compact .It Fn vattr_null "vap" Set vnode attributes in .Fa vap to VNOVAL. .El .Sh CODE REFERENCES .Fn vattr_null is implemented in .Pa sys/kern/vfs_subr.c . .Sh SEE ALSO .Xr intro 9 , .Xr vfs 9 , .Xr vnode 9 , .Xr vnodeops 9