Re: Shell-script variable name case [WAS: Re: can you parse and "tail" at once? (and if you can't why not?)]

To: debian-user@lists.debian.org
Subject: Re: Shell-script variable name case [WAS: Re: can you parse and "tail" at once? (and if you can't why not?)]
From: Eduardo M KALINOWSKI <eduardo@kalinowski.com.br>
Date: Mon, 23 Oct 2023 10:58:27 -0300
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On 23/10/2023 10:56, David wrote:

Hi, for your info, this convention is specified by POSIX:
   https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap08.html

Which says:
   Environment variable names used by the utilities in the Shell and
   Utilities volume of POSIX.1-2017 consist solely of uppercase letters,
   digits, and the <underscore> ( '_' ) from the characters defined in
   Portable Character Set and do not begin with a digit.

And:
   The name space of environment variable names containing lowercase letters
   is reserved for applications. Applications can define any environment
   variables with names from this name space without modifying the behavior
   of the standard utilities.


That's good to know, and pretty much invalidates everything I said.

--
BOFH excuse #239:

CPU needs bearings repacked

Eduardo M KALINOWSKI
eduardo@kalinowski.com.br

Reply to:

References:
- Re: can you parse and "tail" at once? (and if you can't why not?)
  - From: Charles Curley <charlescurley@charlescurley.com>
- can you parse and "tail" at once? (and if you can't why not?)
  - From: Albretch Mueller <lbrtchx@gmail.com>
- Re: can you parse and "tail" at once? (and if you can't why not?)
  - From: Greg Wooledge <greg@wooledge.org>
- Re: can you parse and "tail" at once? (and if you can't why not?)
  - From: Albretch Mueller <lbrtchx@gmail.com>
- Re: can you parse and "tail" at once? (and if you can't why not?)
  - From: Andy Smith <andy@strugglers.net>
- Re: can you parse and "tail" at once? (and if you can't why not?)
  - From: gene heskett <gheskett@shentel.net>
- Re: can you parse and "tail" at once? (and if you can't why not?)
  - From: Albretch Mueller <lbrtchx@gmail.com>
- Re: can you parse and "tail" at once? (and if you can't why not?)
  - From: Greg Wooledge <greg@wooledge.org>
- Re: can you parse and "tail" at once? (and if you can't why not?)
  - From: Eduardo M KALINOWSKI <eduardo@kalinowski.com.br>
- Shell-script variable name case [WAS: Re: can you parse and "tail" at once? (and if you can't why not?)]
  - From: David <bouncingcats@gmail.com>

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