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From: Wolfgang Walther <walther@technowledgy.de>
To: Peter Eisentraut <peter@eisentraut.org>
To: Bruce Momjian <bruce@momjian.us>
Cc: Thomas Munro <thomas.munro@gmail.com>
Cc: 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 20:10:01 +0100
Message-ID: <721bedec-35e7-453d-a442-aeba9fb01399@technowledgy.de> (raw)
In-Reply-To: <4d3e5b19-ea58-456d-8074-4f50a6e0a3bd@eisentraut.org>
References: <3561573.1710771812@sss.pgh.pa.us>
	<CA+hUKG+Tq3GK7bPd03N0Eox3YY4-Hjd7qQjo_QZFjdbhTqQGQA@mail.gmail.com>
	<CA+hUKGK9LUq=uygBRFt3vFO1RL+_scsT4+hMkvea_zTttHZ59Q@mail.gmail.com>
	<ZfolyUQw9z1zxX58@momjian.us>
	<CA+hUKG+Y1D2Bv9v0GbYrhiQ+mhf=6Xj2_viiATnBVFShkfO4VQ@mail.gmail.com>
	<4093813.1710899588@sss.pgh.pa.us>
	<CA+hUKGKNK5V8XwwJJZm36s3EUy8V51xu4XiE8=26n=Wq3OGd4A@mail.gmail.com>
	<4095435.1710900216@sss.pgh.pa.us>
	<CA+hUKGK2cSx3dveMqBD+E9N=zJ0WawBcbk_jnPqmdWBM0DT_3Q@mail.gmail.com>
	<477fa513-6bf0-456d-8d24-1e22a19df671@technowledgy.de>
	<ZfrmN4WHuJgD95fw@momjian.us>
	<c6ee6170-6aa1-436d-bc87-677ffb1c66d5@technowledgy.de>
	<4d3e5b19-ea58-456d-8074-4f50a6e0a3bd@eisentraut.org>

Peter Eisentraut:
>> Would this be a problem? For a running server this would happen only 
>> once when the postmaster starts up, AFAICT.
> 
> I wonder if it would cause issues with systemd or similar, if the PID of 
> the running process is not the one that systemd started.  If so, there 
> is probably a workaround, but it would have to be analyzed.

I don't think that exec even creates a new PID. The current process is 
replaced, so the PID stays the same.

Best,

Wolfgang





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  Cc: walther@technowledgy.de, peter@eisentraut.org, bruce@momjian.us, 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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