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Date: Sun, 13 Dec 2009 13:16:01 +0100
From: Christian Franke <Christian DOT Franke AT t-online DOT de>
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To: cygwin AT cygwin DOT com
Subject: Re: overwriting an in-use executable
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Andy Koppe wrote:
> cp and mv behave differently when trying to overwrite an in-use executable:
>
> $ cp mintty.exe /bin
> cp: cannot create regular file `/bin/mintty.exe': Device or resource busy
>
> $ mv mintty.exe /bin
> [works fine]
>
> That's on 1.7. On 1.5, both cp and mv fail.
>
>    

Same when trying to 'rm' an in-use executable: Works on 1.7, fails with 
'Permission denied' on 1.5. Cygwin 1.7 works like Linux here. I don't 
know whether POSIX requires this behavior.

The difference probably occurs because 1.7 now uses 
NtSetInformationFile() instead of MoveFileEx() and DeleteFile().

Christian


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