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Full Discussion: Using GREP in IF Statement
Top Forums Shell Programming and Scripting Using GREP in IF Statement Post 302807861 by Yoda on Wednesday 15th of May 2013 12:32:36 PM
Old 05-15-2013
Quote:
Originally Posted by Ariean
But why is it not working when I put the same in [] like [if grep -q "ERROR" /home/infrmtca/bin/logfile]
Please note that square brackets [] that contain the statement are a synonym for the 'test' command.

So it is expecting a valid expression and it is failing because the command that you put inside doesn't meet the criteria.

This is why you don't need a square bracket [] to wrap the command.

The grep command returns the exit status 0 or non-zero which if statement can check and transfer the control to corresponding action.
 

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PPI::Statement::Data(3) 				User Contributed Perl Documentation				   PPI::Statement::Data(3)

NAME
PPI::Statement::Data - The __DATA__ section of a file SYNOPSIS
# Normal content __DATA__ This: data is: part of: the PPI::Statement::Data: object INHERITANCE
PPI::Statement::Compound isa PPI::Statement isa PPI::Node isa PPI::Element DESCRIPTION
"PPI::Statement::Data" is a utility class designed to hold content in the __DATA__ section of a file. It provides a single statement to hold all of the data. METHODS
"PPI::Statement::Data" has no additional methods beyond the default ones provided by PPI::Statement, PPI::Node and PPI::Element. However, it is expected to gain methods for accessing the data directly, (as a filehandle for example) just as you would access the data in the Perl code itself. TO DO
- Add the methods to read in the data - Add some proper unit testing SUPPORT
See the support section in the main module. AUTHOR
Adam Kennedy <adamk@cpan.org> COPYRIGHT
Copyright 2001 - 2011 Adam Kennedy. This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself. The full text of the license can be found in the LICENSE file included with this module. perl v5.16.3 2011-02-26 PPI::Statement::Data(3)
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