How to check if it in a sourced bash file or in a nonsourced bash file?

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How to check if it in a sourced bash file or in a nonsourced bash file?

From:	Peng Yu
Subject:	How to check if it in a sourced bash file or in a nonsourced bash file?
Date:	Thu, 7 Nov 2019 07:13:11 +0800

I'd like to know whether it is in a source bash file or a non sourced
bash file. Does anybody know what is the best way to make this test?
Thanks.

-- 
Regards,
Peng

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How to check if it in a sourced bash file or in a nonsourced bash file?, Peng Yu <=
- Re: How to check if it in a sourced bash file or in a nonsourced bash file?, Marco Ippolito, 2019/11/06
  - Re: How to check if it in a sourced bash file or in a nonsourced bash file?, Greg Wooledge, 2019/11/07

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