Connector-bash

== We're Using GitHub Under Protest ==

This project is currently hosted on GitHub. This is not ideal; GitHub is a proprietary, trade-secret system that is not Free and Open Souce Software (FOSS). We are deeply concerned about using a proprietary system like GitHub to develop our FOSS project. For further version of this projects, have a look My web bazzar where most of my ideas are still published until I made a choice for further shares...

We urge you to read about the Give up GitHub campaign from the Software Freedom Conservancy to understand some of the reasons why GitHub is not a good place to host FOSS projects.

If you are a contributor who personally has already quit using GitHub, please send mail to gitproj@f-hauri.ch for any comment or contributions without using GitHub directly.

Any use of this project's code by GitHub Copilot, past or present, is done without our permission. We do not consent to GitHub's use of this project's code in Copilot.

Copying:

As bash, this stuff is licensed under GNU GPL v3.0 or later.

Introduction:

In order to avoid multiple forks to some regular tools like date, bc and any line-by-line converter, based on

coproc bc -l

Then

echo "3*4" >&${COPROC[1]}
read -u $COPROC foo
echo $foo
12

echo >&${COPROC[1]} "pi=4*a(1)"
echo >&${COPROC[1]} "2*pi*12"
read -u $COPROC foo
echo $foo
75.39822368615503772256

There is a function for building I/O connectors:

. shell_connector.bash
newConnector /usr/bin/bc "-l" 1 1
myBc '4*a(1)' PI
declare -p PI
declare -- PI="3.14159265358979323844"

And for tools able to answer 0 or many lines, like SQL Clients, there is another function:

ostty=$(stty -g) && stty -echo
newSqlConnector /usr/bin/mysql "-h hostOrIp -p'$(head -n1)' -B database"
stty $ostty
mySqlReq answer 'SELECT * FROM mytable;'
declare -p answer answer_h answer_e

where all variables are arrays, first one answer will contain all rows, answer_h will hold header and answer_e error messages if any..

ngirard/Connector-bash

Connector-bash

Copying:

Introduction: