Revision 3b38b32b45e7aac29c52a27b7c0de70c536cd62c authored by Edward Tomasz Napierala on 22 January 2010, 11:42:44 UTC, committed by Edward Tomasz Napierala on 22 January 2010, 11:42:44 UTC
Fix permission handling for extended attributes in ZFS. Without this change, ZFS uses SunOS Alternate Data Streams semantics - each EA has its own permissions, which are set at EA creation time and - unlike SunOS - invisible to the user and impossible to change. From the user point of view, it's just broken: sometimes access is granted when it shouldn't be, sometimes it's denied when it shouldn't be. This patch makes it behave just like UFS, i.e. depend on current file permissions. Also, it fixes returned error codes (ENOATTR instead of ENOENT) and makes listextattr(2) return 0 instead of EPERM where there is no EA directory (i.e. the file never had any EA). Tested by: cperciva
1 parent 27b85a8
zdiff.1
.\" $NetBSD: zdiff.1,v 1.3 2003/12/28 12:48:03 wiz Exp $
.\" $OpenBSD: zdiff.1,v 1.2 2003/07/13 17:39:14 millert Exp $
.\"
.\" Copyright (c) 2003 Todd C. Miller <Todd.Miller@courtesan.com>
.\"
.\" Permission to use, copy, modify, and distribute this software for any
.\" purpose with or without fee is hereby granted, provided that the above
.\" copyright notice and this permission notice appear in all copies.
.\"
.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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.\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
.\"
.\" Sponsored in part by the Defense Advanced Research Projects
.\" Agency (DARPA) and Air Force Research Laboratory, Air Force
.\" Materiel Command, USAF, under agreement number F39502-99-1-0512.
.\"
.\" $FreeBSD$
.Dd January 26, 2007
.Dt ZDIFF 1
.Os
.Sh NAME
.Nm zcmp ,
.Nm zdiff
.Nd compare compressed files
.Sh SYNOPSIS
.Nm zcmp
.Op Ar options
.Ar file
.Op Ar file2
.Nm zdiff
.Op Ar options
.Ar file
.Op Ar file2
.Sh DESCRIPTION
.Nm zcmp
and
.Nm zdiff
are filters that invoke
.Xr cmp 1
or
.Xr diff 1
respectively to compare compressed files.
Such files generally have a
.Dq Z
or
.Dq gz
extension (both the
.Xr compress 1
and
.Xr gzip 1
formats are supported).
Any
.Ar options
that are specified are passed to
.Xr cmp 1
or
.Xr diff 1 .
.Pp
If only
.Ar file1
is specified, it is compared against a file with the same name, but
with the extension removed.
When both
.Ar file1
or
.Ar file2
are specified, either file may be compressed.
.Sh ENVIRONMENT
.Bl -tag -width "TMPDIR"
.It Ev TMPDIR
Directory in which to place temporary files.
If unset,
.Pa /tmp
is used.
.El
.Sh FILES
.Bl -tag -width "/tmp/zdiff.XXXXXXXXXX" -compact
.It Pa /tmp/zcmp.XXXXXXXXXX
Temporary file for
.Nm zcmp .
.It Pa /tmp/zdiff.XXXXXXXXXX
Temporary file for
.Nm zdiff .
.El
.Sh SEE ALSO
.Xr cmp 1 ,
.Xr compress 1 ,
.Xr diff 1
.Sh CAVEATS
.Nm zcmp
and
.Nm zdiff
rely solely on the file extension to determine what is, or is not,
a compressed file.
Consequently, the following are not supported as arguments:
.Bl -dash
.It
directories
.It
device special files
.It
filenames indicating the standard input
.Pq Dq \-
.El
Computing file changes ...
