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Re: [Help-bash] How to print a bash variable in the most succinct way?


From: Chris F.A. Johnson
Subject: Re: [Help-bash] How to print a bash variable in the most succinct way?
Date: Tue, 16 Aug 2016 20:29:03 -0400 (EDT)
User-agent: Alpine 2.10 (DEB 1266 2009-07-14)

On Tue, 16 Aug 2016, Peng Yu wrote:

On Tue, Aug 16, 2016 at 2:56 PM, Chet Ramey <address@hidden> wrote:
On 8/16/16 3:21 PM, Peng Yu wrote:


How to only generate variables that are modifiable (i.e., not readonly)?

Generate a list of all variables.  Generate a list of readonly variables.
Do a diff.

How to generate a list of the names of the readonly variables?
`readonly` will print both the names and their values. I will run into
the same problem when there are $'\n' in their values.

readonly -p| awk -F "[= ]" '/^declare/ {print $3}'

--
Chris F.A. Johnson, <http://cfajohnson.com>



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