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From: Bruce Momjian <bruce@momjian.us>
To: Wolfgang Walther <walther@technowledgy.de>
Cc: Thomas Munro <thomas.munro@gmail.com>
Cc: peter@eisentraut.org, Christophe Pettus <xof@thebuild.com>
Cc: Andrew Dunstan <andrew@dunslane.net>
Cc: PostgreSQL Bugs <pgsql-bugs@lists.postgresql.org>
Cc: Tom Lane <tgl@sss.pgh.pa.us>
Subject: Re: Regression tests fail with musl libc because libpq.so can't be loaded
Date: Wed, 20 Mar 2024 09:35:51 -0400
Message-ID: <ZfrmN4WHuJgD95fw@momjian.us> (raw)
In-Reply-To: <477fa513-6bf0-456d-8d24-1e22a19df671@technowledgy.de>
References: <3561573.1710771812@sss.pgh.pa.us>
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	<477fa513-6bf0-456d-8d24-1e22a19df671@technowledgy.de>

On Wed, Mar 20, 2024 at 10:39:20AM +0100, Wolfgang Walther wrote:
> Peter Eisentraut:
> > We could turn it around and do
> > 
> > #if defined(__linux__)
> > #if defined(__GLIBC__) || defined(__UCLIBC__ )
> > #define PS_USE_CLOBBER_ARGV
> > #else
> > #define PS_USE_NONE
> > #endif
> > #endif
> 
> This works as well.

Yes, I prefer this.  I am worried the environ hackery will bite us
someday and the cause will be hard to find.

> I also put together a PoC of what was mentioned in musl's mailing list:
> Instead of clobbering environ at all, exec yourself again with padded argv0.
> This works, too. Attached.

It is hard to imagine why we would add an extra exec on every Linux
server start for this.

-- 
  Bruce Momjian  <bruce@momjian.us>        https://momjian.us
  EDB                                      https://enterprisedb.com

  Only you can decide what is important to you.





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  Cc: bruce@momjian.us, walther@technowledgy.de, thomas.munro@gmail.com, xof@thebuild.com, andrew@dunslane.net, pgsql-bugs@lists.postgresql.org, tgl@sss.pgh.pa.us
  Subject: Re: Regression tests fail with musl libc because libpq.so can't be loaded
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