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The _ env variable


From: Peng Yu
Subject: The _ env variable
Date: Wed, 10 Feb 2021 13:27:51 -0600

Hi,

It looks like that "_" is set to the path of the program being called.

Where is this behavior officially defined? Why is this variable
useful, given argv[0] is also the path to the program being called?
Thanks.

-- 
Regards,
Peng



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