From: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
To: "Ted Ts'o" <tytso@mit.edu>
Cc: "Michael Kerrisk \(man-pages\)" <mtk.manpages@gmail.com>,
Mike Frysinger <vapier@gentoo.org>,
linux-man@vger.kernel.org, viro@zeniv.linux.org.uk,
Richard Weinberger <richard@nod.at>,
lkml <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] open(2): document O_PATH
Date: Thu, 03 May 2012 13:57:21 +0530 [thread overview]
Message-ID: <87fwbhhdp2.fsf@skywalker.in.ibm.com> (raw)
In-Reply-To: <20120430114410.GB28308@thunk.org>
Ted Ts'o <tytso@mit.edu> writes:
> It might also be a good idea to document explicitly whether or not
> things like fstat() and the syscalls to manipulate extended attributes
> are expected to work.
>
fstat won't work, but fstatat with an empty path name would work. O_PATH
descriptors are suppose to be used as "location only descriptors".
We then extended the *at syscalls to work with EMPTY pathnames so that
O_PATH descriptors can be used with readlink, fchownat and fstatat().
This was done to enable us to do these operation on symlinks.
(65cfc6722361570bfe255698d9cd4dccaf47570d)
Examples for O_PATH and handle syscall can be found in qemu and
handle-test repo
http://git.qemu.org/?p=qemu.git;a=blob;f=hw/9pfs/virtio-9p-handle.c;h=f96d17a9749a6f672741ff4dcb98da81d1dcc3ce;hb=HEAD
https://github.com/kvaneesh/handle-test/blob/master/handle.h
-aneesh
next prev parent reply other threads:[~2012-05-03 8:33 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1335669917-23970-1-git-send-email-vapier@gentoo.org>
2012-04-29 21:39 ` [PATCH] open(2): document O_PATH Michael Kerrisk (man-pages)
2012-04-30 7:39 ` Aneesh Kumar K.V
2012-04-30 11:44 ` Ted Ts'o
2012-05-03 6:48 ` Michael Kerrisk (man-pages)
2012-05-03 8:27 ` Aneesh Kumar K.V [this message]
2012-05-03 13:07 ` Ted Ts'o
2012-05-03 13:20 ` Al Viro
2012-05-06 1:00 ` H. Peter Anvin
2012-05-03 6:47 ` Michael Kerrisk (man-pages)
2012-05-03 14:04 ` Aneesh Kumar K.V
2012-05-03 14:11 ` Al Viro
2012-05-05 11:31 ` Michael Kerrisk (man-pages)
2013-01-08 18:52 ` Al Viro
2013-03-14 9:35 Michael Kerrisk (man-pages)
2013-07-20 11:40 ` Al Viro
2013-07-20 20:56 ` Michael Kerrisk
2013-07-22 8:46 ` Peter Schiffer
2013-07-22 10:45 ` Michael Kerrisk (man-pages)
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=87fwbhhdp2.fsf@skywalker.in.ibm.com \
--to=aneesh.kumar@linux.vnet.ibm.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-man@vger.kernel.org \
--cc=mtk.manpages@gmail.com \
--cc=richard@nod.at \
--cc=tytso@mit.edu \
--cc=vapier@gentoo.org \
--cc=viro@zeniv.linux.org.uk \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox