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Full Discussion: How to get the return code of subroutines executed as standalone as command line in Perl ?
Top Forums Shell Programming and Scripting How to get the return code of subroutines executed as standalone as command line in Perl ? Post 302420216 by ennstate on Tuesday 11th of May 2010 03:40:28 AM
Old 05-11-2010
How to get the return code of subroutines executed as standalone as command line in Perl ?
How to do I get the return code of a subroutine in a perl module if invoke the subroutine as standalone,

I have an module say TestExit.pm and in that i have a subroutine say myTest() which is returns 12, if i were to call the subroutine from
command line like

CASE:1 ( Without an explict exit in END routine )
Code:
perl -I/tmp/ -MTestExit -e 'myTest()'
echo $?
0

The above statement doesnot give me the return value of the subroutine ( which is 12 ) I get exit code as 0


Where as if I explicity do an exit in the END routine I am able to get the return code properly

Case2: ( With an explict an exit in END )
Code:
perl -I/tmp/ -MTestExit -e 'myTest()'
echo $?
12

Is there a way to pass an argument to the module or Is there a trick to get the exit code without modifying the END routing to an explict exit,


END routine exit is commented to get to match the case 1
TestExit.pm
Code:
package TestExit;

use strict;
use warnings;

our $status;

BEGIN
{
   $status = 0;
}

require Exporter;
our @ISA = qw(Exporter);

our %EXPORT_TAGS = (
                        'basic'    => [qw( myTest
                                       )],
                   );

Exporter::export_tags('basic');

sub myTest {
   print "Called myTest routine, Setting return code as 12\n";
   $status = 12;
}

1;

END {
  print "RETURN VAL:$status \n";
  #exit $status;
}

__END__

 

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LEARN ABOUT DEBIAN

pdl::exporter

Exporter(3pm)						User Contributed Perl Documentation					     Exporter(3pm)

NAME

       PDL::Exporter - PDL export control

DESCRIPTION

       Implements the standard conventions for import of PDL modules in to the namespace

       Hopefully will be extended to allow fine control of which namespace is used.

SYNOPSIS

       use PDL::Exporter;

	use PDL::MyModule;	 # Import default function list ':Func'
	use PDL::MyModule '';	 # Import nothing (OO)
	use PDL::MyModule '...'; # Same behaviour as Exporter

SUMMARY

       "PDL::Exporter" is a drop-in replacement for the Exporter module. It confers the standard PDL export conventions to your module.  Usage is
       fairly straightforward and best illustrated by an example. The following shows typical usage near the top of a simple PDL module:

	  package PDL::MyMod;

	  use strict;

	  # For Perl 5.6:
	  use vars qw($VERSION @ISA @EXPORT @EXPORT_OK %EXPORT_TAGS);
	  # For more modern Perls:
	  our ($VERSION, @ISA, @EXPORT, @EXPORT_OK, %EXPORT_TAGS);

	  require PDL::Exporter;

	  @ISA = qw(PDL::Exporter);
	  @EXPORT_OK = qw(inc myfunc); # these will be exported by default
	  %EXPORT_TAGS = (Func=>[@EXPORT_OK],
			  Internal => [qw/internfunc1 internfunc2/],
			 );

	   # ... body of your module

	  1; # end of simple module

SEE ALSO

       Exporter

AUTHOR

       Copyright (C) Karl Glazebrook (kgb@aaoepp.aao.gov.au).  Some docs by Christian Soeller.	All rights reserved. There is no warranty. You are
       allowed to redistribute this software / documentation under certain conditions. For details, see the file COPYING in the PDL distribution.
       If this file is separated from the PDL distribution, the copyright notice should be included in the file.

perl v5.14.2							    2012-01-02							     Exporter(3pm)
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