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Check if a package is installed


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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