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Mail Archives: cygwin/2022/01/11/16:10:12

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Date: Tue, 11 Jan 2022 16:08:32 -0500
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Subject: Re: posix_spawn issues on i686
To: Jeremy Drake <cygwin AT jdrake DOT com>, cygwin AT cygwin DOT com
References: <alpine DOT BSO DOT 2 DOT 21 DOT 2201101132030 DOT 11760 AT resin DOT csoft DOT net>
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On 1/11/2022 1:45 PM, Jeremy Drake via Cygwin wrote:
> Sorry, I am not subscribed to the list so don't have the message to reply
> to for threading purposes, but attached please find a C reproducer that
> works on x86_64 but fails on i686.  The particular issue seems to be the
> POSIX_SPAWN_RESETIDS flag - not setting that allows i686 to succeed too.

I don't have time to check this carefully, but it looks to me like the problem 
is that process_spawnattr calls setegid and seteuid instead of setegid32 and 
seteuid32.  This causes truncation of the gid and uid.

Ken

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