From: "Érico Nogueira" <ericonr@disroot.org>
To: <musl@lists.openwall.com>
Subject: Re: [musl] realpath without procfs -- should be ready for inclusion
Date: Mon, 23 Nov 2020 00:17:27 -0300 [thread overview]
Message-ID: <C7ABG2VZCDZZ.8MJR3SJ8HXLA@mussels> (raw)
In-Reply-To: <97dd3cf7c69673e5962e9ccd46ea5131@ispras.ru>
On Sun Nov 22, 2020 at 11:03 PM -03, Alexey Izbyshev wrote:
> On 2020-11-23 01:56, Rich Felker wrote:
> > I originally considered keeping the procfs based version and only
> > using the new one as a fallback, but I discovered there are cases
> > (involving chroot, namespaces, etc.) where the answer from procfs is
> > wrong and validating it requires basically the same procedure as
> > implementing it manually (walking and performing readlink on each path
> > component).
> >
> Pity that the simple and fast procfs-based implementation goes away. Do
> you have any specific example of a wrong answer from procfs at hand, or
> at least a more specific direction to look at than just
> "chroot/namespaces"?
bubblewrap (when driven by Flatpak) is one such software. Void carries
a patch [1] with NetBSD's realpath impl to work around this. Without it,
launching flatpak applications sometimes didn't work at all.
- [1] https://github.com/void-linux/void-packages/blob/da86d30391e2b3535e8f9dfae452d2b362887e41/srcpkgs/bubblewrap/patches/realpath-workaround.patch
next prev parent reply other threads:[~2020-11-23 3:23 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-22 22:56 Rich Felker
2020-11-23 2:03 ` Alexey Izbyshev
2020-11-23 3:17 ` Érico Nogueira [this message]
2020-11-23 3:34 ` Rich Felker
2020-11-23 3:19 ` Rich Felker
2020-11-23 18:56 ` Rich Felker
2020-11-23 20:53 ` Rich Felker
2020-11-24 3:39 ` Alexey Izbyshev
2020-11-24 4:26 ` Rich Felker
2020-11-24 5:13 ` Alexey Izbyshev
2020-11-24 6:30 ` Rich Felker
2020-11-24 9:21 ` Alexey Izbyshev
2020-11-24 14:35 ` Rich Felker
2020-11-24 20:17 ` Rich Felker
2020-11-25 15:02 ` Rich Felker
2020-11-25 19:40 ` Alexey Izbyshev
2020-11-24 20:31 ` Rich Felker
2020-11-25 5:40 ` Alexey Izbyshev
2020-11-25 15:03 ` Rich Felker
2020-11-24 3:41 ` Alexey Izbyshev
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