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Re: The _ env variable
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From: |
Lawrence Velázquez |
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Subject: |
Re: The _ env variable |
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Date: |
Wed, 10 Feb 2021 14:39:56 -0500 |
> On Feb 10, 2021, at 2:27 PM, Peng Yu <pengyu.ut@gmail.com> wrote:
>
> Hi,
>
> It looks like that "_" is set to the path of the program being called.
Among other things, as described in the link below.
> Where is this behavior officially defined?
https://www.gnu.org/software/bash/manual/html_node/Bash-Variables.html
> Why is this variable useful, given argv[0] is also the path to the program
> being called?
The value of argv[0] is not necessarily a path.
https://mywiki.wooledge.org/BashFAQ/028#Why_.240_is_NOT_an_option
vq