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Top Forums Shell Programming and Scripting Please can any one explain this ${0##/} Post 302180965 by unilover on Tuesday 1st of April 2008 03:26:42 PM
Old 04-01-2008
PGM=${0##/}
TMP=/tmp/${PGM}.$$

$0 is the complete-name-of-the-script in side the script (e.g. /home/mydir/myscript.sh)

So, ${0##/} means the complete-name-of-the-script without the starting-slash (if it exists)!!

But, what I thing you wanted to write is:

PGM=${0##*/}

which means complete-name-of-the-script without everthing up to and including the last-slash (e.g. myscript.sh)

Then, $$ is the Process-ID of the current script. So, TMP will be set to be /tmp/myscript.sh.1234 (where 1234 is the process-id).

This combination is normally used to create unique (i.e. different for each running script) names.
 

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Catalyst::Controller::SRU(3pm)				User Contributed Perl Documentation			    Catalyst::Controller::SRU(3pm)

NAME
Catalyst::Controller::SRU - Dispatch SRU methods with Catalyst SYNOPSIS
package MyApp::Controller::SRU; # use it as a base controller use base qw( Catalyst::Controller::SRU ); # explain, scan and searchretrieve methods sub explain { my ( $self, $c, $sru_request, # ISA SRU::Request::Explain $sru_response, # ISA SRU::Response::Explain ) = @_; } sub scan { my ( $self, $c, $sru_request, # ISA SRU::Request::Scan $sru_response, # ISA SRU::Response::Scan $cql, # ISA CQL::Parser root node ) = @_; } sub searchRetrieve { my ( $self, $c, $sru_request, # ISA SRU::Request::SearchRetrieve $sru_response, # ISA SRU::Response::SearchRetrieve $cql, # ISA CQL::Parser root node ) = @_; } DESCRIPTION
This module allows your controller class to dispatch SRU actions ("explain", "scan", and "searchRetrieve") from its own class. METHODS
index : Private This method will create an SRU request, response and possibly a CQL object based on the type of SRU request it finds. It will then pass the data over to your customized method. SEE ALSO
o Catalyst AUTHOR
Brian Cassidy <bricas@cpan.org> COPYRIGHT AND LICENSE
Copyright 2005-2009 by Brian Cassidy This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself. perl v5.12.4 2009-12-02 Catalyst::Controller::SRU(3pm)
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