Accessing Variable effectively from shell script

Question

I have one ini configuration file, I need to create a shell script using this configuration. What is the easiest method to access all variable, Can be used effectively from the shell script.

Can I use an array or something? Now planing to find the count of [] brackets then through awk get all variables one by one. Please suggest if any easiest way to effectively

cat app.ini

Below the output of my sample configuration file. Can be N no of Blocks.

[APP1]
name=Application1
StatusScript=/home/status_APP1.sh
startScript=/home/start_APP1.sh
stopScript=/home/stop_APP1.sh
restartScript=/home/restart.APP1.sh
logdir=/log/APP1/

[APP2]
name=Application2
StatusScript=/home/status_APP2.sh
startScript=/home/start_APP2.sh
stopScript=/home/stop_APP2.sh
restartScript=/home/restart.APP2.sh
logdir=/log/APP2/
.
.
.
.
.
[APPN]
name=ApplicationN
StatusScript=/home/status_APPN.sh
startScript=/home/start_APPN.sh
stopScript=/home/stop_APPN.sh
restartScript=/home/restart.APPN.sh
logdir=/log/APPN

/

You want to use one [APP] section at a time to pass some variables to another command? Can you show at least in pseudocode what the calling code looks like? — tripleee
– tripleee, Commented Mar 2, 2018 at 7:25

Alexander Miroch · Accepted Answer · 2018-03-02 07:38:23Z

1

Consider using a library like bash-ini-parser https://github.com/albfan/bash-ini-parser. It covers a lot of nuances like indentation, whitespaces, comments etc.

The example for your case may look like this:

 #!/bin/bash

. bash-ini-parser

cfg_parser app.ini

cfg_section_APP1
echo $name

cfg_section_APP2
echo $logdir

cfg_section_APPN
echo $logdir

answered Mar 2, 2018 at 7:38

Alexander Miroch

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3 Comments

tripleee Over a year ago

If you are reading in variables from an external source, you should definitely use double quotes around their values when interpolating them.

chepner Over a year ago

I would be leery of the linked parser; the readme itself describes it as " more a hack than a reliable parser".

Arun Binoy Over a year ago

Very Good option, Nicely organised :)

Arun Binoy · Accepted Answer · 2018-04-05 07:25:52Z

0

Below line help us to locate particular values in each section.

sed -nr "/^\[APP1\]/ { :l /^name[ ]*=/ { s/.*=[ ]*//; p; q;}; n; b l;}" app.ini

answered Apr 5, 2018 at 7:25

Arun Binoy

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