Shell script / Grep / Awk to variable and Loop


 
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Old 01-26-2010
Question Shell script / Grep / Awk to variable and Loop

Hi,

I have a text file with data in that I wish to extract, assign to a variable and process through a loop.

Kind of the process that I am after:

1: Grep the text file for the values.
Currently using:
cat /root/test.txt | grep TESTING= | awk -F"=" '{ a[i++] = $2 } {print a[1]}' | sort -u

This will print out the first value. (Change the print to then print the second, print a[2] )

2: Assign all occurences of my extracted value to a variable.

3: With each occurrence/ variable pass it through a loop and use it to locate/extract more information.

4: The information will then be output to another file.

For example.

Test.txt content:

Hello Mum
TESTING=FortyFive
Hello World
TESTING=IO432

Assign both grep'd/awk'd data to a variable, because for each it needs to loop through more grep/awk's to find more data.

I want to extract and display in my output file:

TESTING::FortyFive,IO432
TESTED::More extracted data,Even more data
AGAIN::Still more, and again


Therefore the data before the comma related to the first value, FortyFive, the data after the comma in the output file refers to the second value, IO432.

I hope you can understand what I am trying to do.

Hope someone can help.
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IO::Async::Loop::Glib(3pm)				User Contributed Perl Documentation				IO::Async::Loop::Glib(3pm)

NAME
"IO::Async::Loop::Glib" - use "IO::Async" with Glib or GTK SYNOPSIS
use IO::Async::Loop::Glib; my $loop = IO::Async::Loop::Glib->new(); $loop->add( ... ); ... # Rest of GLib/Gtk program that uses GLib Glib::MainLoop->new->run(); Or $loop->loop_forever(); Or while(1) { $loop->loop_once(); } DESCRIPTION
This subclass of "IO::Async::Loop" uses the "Glib::MainLoop" to perform read-ready and write-ready tests. The appropriate "Glib::IO" sources are added or removed from the "Glib::MainLoop" when notifiers are added or removed from the set, or when they change their "want_writeready" status. The callbacks are called automatically by Glib itself; no special methods on this loop object are required. CONSTRUCTOR
$loop = IO::Async::Loop::Glib->new() This function returns a new instance of a "IO::Async::Loop::Glib" object. It takes no special arguments. METHODS
There are no special methods in this subclass, other than those provided by the "IO::Async::Loop" base class. $count = $loop->loop_once( $timeout ) This method calls the "iteration()" method on the underlying "Glib::MainContext". If a timeout value is supplied, then a Glib timeout will be installed, to interrupt the loop at that time. If Glib indicates that any callbacks were fired, then this method will return 1 (however, it does not mean that any "IO::Async" callbacks were invoked, as there may be other parts of code sharing the Glib main context. Otherwise, it will return 0. SEE ALSO
o Glib - Perl wrappers for the GLib utility and Object libraries o Gtk2 - Perl interface to the 2.x series of the Gimp Toolkit library AUTHOR
Paul Evans <leonerd@leonerd.org.uk> perl v5.14.2 2013-03-01 IO::Async::Loop::Glib(3pm)