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Top Forums Shell Programming and Scripting Blog-Thread: Creating a Shell Wrapper and Runtime Modifier (SWARM) Post 303045285 by sea on Sunday 15th of March 2020 12:18:02 PM
Old 03-15-2020
Currently listening: End of Line by Daft Punk, Tron Legacy OST

Oh what whall I say...
That "-> https://www.unix.com/shell-programmi...-new-post.html <-" was really costing my nerves!
Thanks here again to Made In Germany (MIG) for his 'echo wrappers' (and the additional help)!

Luckily at least ask seemed to work 'out of the box' for the pipe tweaks today. Smilie

Allthough the average load & output time was around 0.150 s (0.097-0.210), it recently became 'jumps' up to 0.300 or higher.
As a natural tweaker, I wanted to fix this, one breaks things along the way - which helped to make the load sequence more stable.

As I had prepared a subshell process if no $COLUMNS and no $LINES should be available,
to have them calculated and exported, but since my sytem has them at hand, well, I just assumed the code would work,
since there were subprocess and I had seen with set -x that the code indeed was executed in the shell.

Regardless, the exported variables were not to be found in the shell I sourced the file with the the sub process in from.
Something like this:
Code:
[sea/ .bin]$ cat testfile 
(
	declare -g my_test_a="a test"
	export my_test_b="an exported beer"
)
[sea/ .bin]$ . testfile 
[sea/ .bin]$ echo $my_test_a

[sea/ .bin]$ echo $my_test_b

Well, something like this, but with a looped sleep while grep checked the ps output for the $PPID as actual sub process.

That was quite, disencouraging.
This would have been so cool, real multi-tasking in console!
Guess I'm too much of a dreamer Smilie

Next will be alot of small utility functions, and to finalize the current core commands with 'help' functionality - before adding new core (usualy slitly bigger/ more complex command functions..
This User Gave Thanks to sea For This Post:
 
Test Your Knowledge in Computers #682
Difficulty: Easy
Steve Job's was the primary founder and majority shareholder of Pixar
True or False?

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Text::Wrapper(3pm)					User Contributed Perl Documentation					Text::Wrapper(3pm)

NAME
Text::Wrapper - Word wrap text by breaking long lines VERSION
This document describes version 1.04 of Text::Wrapper, released May 25, 2012. SYNOPSIS
require Text::Wrapper; $wrapper = Text::Wrapper->new(columns => 60, body_start => ' '); print $wrapper->wrap($text); $wrapper->columns(70); DESCRIPTION
Text::Wrapper provides simple word wrapping. It breaks long lines, but does not alter spacing or remove existing line breaks. If you're looking for more sophisticated text formatting, try the Text::Format module. Reasons to use Text::Wrapper instead of Text::Format: o Text::Wrapper is significantly smaller. o It does not alter existing whitespace or combine short lines. It only breaks long lines. Again, if Text::Wrapper doesn't meet your needs, try Text::Format. ATTRIBUTES
body_start The text that begins the second and following lines of a paragraph. (Default '') columns The number of columns to use. This includes any text in body_start or par_start. (Default 70) par_start The text that begins the first line of each paragraph. (Default '') wrap_after A line can wrap after any of the characters in this string. Setting this to the empty string means a line will wrap only at whitespace. (Default '-') METHODS
wrap $wrapper->wrap($text) Returns a word wrapped copy of $text. The original is not altered. CONFIGURATION AND ENVIRONMENT
Text::Wrapper requires no configuration files or environment variables. DEPENDENCIES
None. INCOMPATIBILITIES
None reported. BUGS AND LIMITATIONS
Does not handle tabs (they're treated just like spaces). All characters are treated as being the same width, including zero-width spaces and combining accents. Does not break words that can't fit on one line. AUTHOR
Christopher J. Madsen "<perl AT cjmweb.net>" Please report any bugs or feature requests to "<bug-Text-Wrapper AT rt.cpan.org>" or through the web interface at http://rt.cpan.org/Public/Bug/Report.html?Queue=Text-Wrapper <http://rt.cpan.org/Public/Bug/Report.html?Queue=Text-Wrapper>. You can follow or contribute to Text-Wrapper's development at http://github.com/madsen/text-wrapper <http://github.com/madsen/text- wrapper>. COPYRIGHT AND LICENSE
This software is copyright (c) 2012 by Christopher J. Madsen. This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself. DISCLAIMER OF WARRANTY
BECAUSE THIS SOFTWARE IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY FOR THE SOFTWARE, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE SOFTWARE "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE SOFTWARE IS WITH YOU. SHOULD THE SOFTWARE PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR, OR CORRECTION. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR REDISTRIBUTE THE SOFTWARE AS PERMITTED BY THE ABOVE LICENSE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE SOFTWARE (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE SOFTWARE TO OPERATE WITH ANY OTHER SOFTWARE), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. perl v5.14.2 2012-05-25 Text::Wrapper(3pm)

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