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Message-ID:	<03f587f3-35a1-5d34-c34e-f14be4446cea@dronecode.org.uk>
Date:	Sun, 5 Dec 2021 15:43:52 +0000
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Subject:	Re: Cygwin installer does not terminate
To:	Stefan Smorra <stefan AT smorra-it DOT de>,
	The Cygwin Mailing List <cygwin AT cygwin DOT com>
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From:	Jon Turney <jon DOT turney AT dronecode DOT org DOT uk>
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On 30/11/2021 09:09, Stefan Smorra wrote:
> Hello,
> 
> I am running the x86 installer under 64bit Windows 10 (as administrator) 
> as follows:
> 
[...]
> 
> The problem is that the installer does not terminate. It stays open in 
> the background (hidden) what can be seen in the task manager.
> 
> Also it's consuming 90% CPU and the generated log file under 
> C:\smo-cygwin\var\log\setup.log is about 12GiB after 5min.
> 
> The log file looks like this:
> 
> ...
> 2021/11/29 13:21:38 Changing gid back to original
> ...
> 2021/11/29 13:22:05 running: C:\smo-cygwin\bin\dash.exe 
> "/etc/postinstall/zp_man-db-update-index.dash"
> 2021/11/29 13:22:05 Changing gid to AdministratorsEnding cygwin install
> ...
> 
> The line "Changing gid to AdministratorsEnding cygwin install" then 
> appears millions of times. It never ends and there are no other log 
> lines coming.
> 
> Note that this only happens if I run the installer as administrator.
> 
> There seems to be problem when the installer changes gid. This can be 
> seen in the log. The fact that it only happens if the installer is run 
> as administrator approves this.

Thanks for reporting this problem.

After some staring at the code, I think the problem is perhaps that the 
linked list of log entries can get corrupted if multiple threads add 
messages to it simultaneously.

I built an updated setup with a change to avoid that in this case:

https://cygwin.com/setup/setup-2.910-3-g217aad.x86_64.exe
https://cygwin.com/setup/setup-2.910-3-g217aad.x86.exe

Perhaps you could try that and see if it improves things for you?

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