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Top Forums Shell Programming and Scripting Trouble with passing Variable from bash to awk gsub command Post 302580574 by ni2 on Friday 9th of December 2011 01:18:57 AM
Old 12-09-2011
Here is what I tried.

less FILENAME
Quote:
Richard:foo
Sam:foo
Carl:foo
less test.sh
Code:
#!/bin/bash

echo "Enter Username"
read Username

awk -F: -v var=${Username} '$0 ~ var {gsub(/foo/,"bar",$2); print}'  FILENAME

bash test.sh
Quote:
Enter Username
Richard
Richard bar
less FILENAME
Quote:
Richard:foo
Sam:foo
Carl:foo
I am using GNU Awk 3.1.7

This is what I tested with. Maybe you could give a sample of the result you are getting.
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Class::Accessor::Lvalue(3pm)				User Contributed Perl Documentation			      Class::Accessor::Lvalue(3pm)

NAME
Class::Accessor::Lvalue - create Lvalue accessors SYNOPSIS
package Foo; use base qw( Class::Accessor::Lvalue ); __PACKAGE__->mk_accessors(qw( bar )) my $foo = Foo->new; $foo->bar = 42; print $foo->bar; # prints 42 DESCRIPTION
This module subclasses Class::Accessor in order to provide lvalue accessor makers. CAVEATS
o Though Class::Accessor mutators allows for the setting of multiple values to an attribute, the mutators that this module creates handle single scalar values only. This should not be too much of a hinderance as you can still explictly use an anonymous array. o Due to the hoops we have to jump through to preserve the Class::Accessor ->get and ->set behaviour this module is potentially slow. Should you not need the flexibility granted by the ->get and ->set methods, it's highly reccomended that you use Class::Acces- sor::Lvalue::Fast which is simpler and much faster. AUTHOR
Richard Clamp <richardc@unixbeard.net> with many thanks to Yuval Kogman for helping with the groovy lvalue tie magic used in the main class. COPYRIGHT
Copyright (C) 2003 Richard Clamp. All Rights Reserved. This module is free software; you can redistribute it and/or modify it under the same terms as Perl itself. SEE ALSO
Class::Accessor, Class::Accessor::Lvalue::Fast perl v5.8.8 2008-02-01 Class::Accessor::Lvalue(3pm)
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