From: Alexander Monakov <amonakov@ispras.ru>
To: mtk.manpages@gmail.com
Cc: Dave Chupreev <cdn.dev@yandex.ru>,
"Alejandro Colomar (man-pages)" <alx.manpages@gmail.com>,
linux-man <linux-man@vger.kernel.org>,
GNU C Library <libc-alpha@sourceware.org>,
Roland McGrath <roland@hack.frob.com>
Subject: Re: Bug reporting
Date: Sun, 9 May 2021 20:20:40 +0300 (MSK) [thread overview]
Message-ID: <alpine.LNX.2.20.13.2105092008010.5297@monopod.intra.ispras.ru> (raw)
In-Reply-To: <CAKgNAkgbJBM5yiOtq9X-Ber+ns_8xcp-8jr7rSYLanz+HnQWXw@mail.gmail.com>
On Mon, 10 May 2021, Michael Kerrisk (man-pages) via Libc-alpha wrote:
> Hello,
>
> On Fri, 7 May 2021 at 02:21, Dave Chupreev <cdn.dev@yandex.ru> wrote:
> >
> > Well I see, I've tried on Linux and yea I didn't find any option to insert multiple definitions.
>
> I think the only way to insert multiple definitions is by direct
> manipulation of 'extern char **environ'.
You can cause a program to start with multiple definitions, because it is
possible to pass arbitrarily funny stuff as 'envp' argument to execve, such as:
- duplicated entries
- entries without a '='
- entries starting with '='
- empty strings
- "2 x 2 = 4"
All of that will be present in the exec'd program's environment array.
Alexander
next prev parent reply other threads:[~2021-05-09 17:20 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1621111620246345@mail.yandex.ru>
2021-05-05 22:37 ` Bug reporting Alejandro Colomar (man-pages)
[not found] ` <1492841620310804@mail.yandex.ru>
2021-05-09 16:40 ` Michael Kerrisk (man-pages)
2021-05-09 17:20 ` Alexander Monakov [this message]
2021-05-09 17:58 ` Michael Kerrisk (man-pages)
2014-09-26 13:41 bug reporting Ajay
2014-09-26 23:51 ` brian m. carlson
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