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Message-ID: <8a44a6ea-9cde-f2ef-a691-79e134c3b1d3@ispras.ru>
Date: Wed, 1 Oct 2025 10:44:38 +0300 (MSK)
From: Alexander Monakov <amonakov@...ras.ru>
To: musl@...ts.openwall.com
Subject: Re: `unsetenv()` does not always work when run in an
`__attribute__((constructor))` function
On Tue, 30 Sep 2025, Mike Hilgendorf wrote:
> cd bash-5.2.37
> export CC=musl-gcc
> ./configure
> make
>
> env -i LD_PRELOAD=path/to/preload.so ./bash
Try
nm -D ./bash | grep env
If you see 'T' symbols, bash exports its own env functions, and your LD_PRELOAD
module invokes the implementations from bash, not libc.
Alexander
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