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Date:	Mon, 01 Oct 2012 13:03:45 +0200
From:	=?ISO-8859-1?Q?Vincent_Rivi=E8re?= <vincent DOT riviere AT freesbee DOT fr>
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To:	cygwin AT cygwin DOT com
Subject:	Check if a package is installed
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Hello.

I would like to know how to reliably test if a Cygwin package is already 
installed (just like setup.exe does).

Currently, I test the existence of /etc/setup/<package>.lst.gz. It works 
perfectly for me, but a user reported to me that that file was missing 
sometimes.

I see there is also package information listed in 
/etc/setup/installed.db. Maybe this information should be considered as 
more reliable?

-- 
Vincent Rivière

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