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Subject: Re: Unattended upgrade does not report errors via the exit code
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From: Ken Brown <kbrown AT cornell DOT edu>
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Date: Wed, 4 Jul 2018 23:16:21 -0400
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On 7/4/2018 6:25 PM, David Stacey wrote:
> On 04/07/18 19:59, Ken Brown wrote:
>> On 7/3/2018 1:55 PM, R. Diez via cygwin wrote:
>>> I tried printing $? from a Cygwin shell afterwards, and %ERRORLEVEL% 
>>> in a Windows console, and it always showed an exit status of 0.
>>
>> setup is a Windows program, not a Cygwin application, so I don't think 
>> you can expect $? to contain its exit status.  I don't know enough 
>> about Windows programming to know what would have to be changed in the 
>> setup sources to support %ERRORLEVEL%.
> 
> %ERRORLEVEL% is the return code from the last programme or script to 
> execute. Provided that setup exits with zero on success and non-zero on 
> an error condition, there's nothing extra to be done.

According to 
https://stackoverflow.com/questions/334879/how-do-i-get-the-application-exit-code-from-a-windows-command-line/11476681#11476681, 
that's not true for windowed applications, but it is true if the 
application is started via 'start /wait'.  I haven't tested this.

Ken


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