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Full Discussion: Getopt Help
Top Forums Shell Programming and Scripting Getopt Help Post 303015612 by mutley2202 on Sunday 8th of April 2018 02:50:38 PM
Old 04-08-2018
Getopt Help
Hi All,

An old work friend wrote a script which I've been trying to understand how a section of it currently works and work out how i can add some command line switches which i can use later in the script to append the output depending on the command line arguements.

Currently it works by triggering is as per the below

Code:
./data_parser.pl -f testinputfile.txt

Code:
use strict;
use Getopt::Std;
use constant DEBUG => 0;

$| = 1;
my $current_colour = '36';

my %opt = ('f' => '-');

getopts("f:", \%opt);
my $opentag = $opt{'f'};
if ($opt{'f'} eq '-') {
        ;
} elsif (-f $opt{'f'}) {
        if ($opt{'f'} =~ /\.gz$/) {
                $opentag = 'gunzip -c '.$opt{'f'}.'|';
        }
} else {
        die "File ", $opt{'f'}, " not found\n";
}
open (FH, $opentag);

I dont understand what the getopts parts are doing, would someone be kind enough to shed some light and point me in the right direction with how i can add some switches on command execution.

Thanks in advance.
 

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LEARN ABOUT DEBIAN

mummy

MUMMY(1)							   User Commands							  MUMMY(1)

NAME

       mummy - generate C# wrappers from C++ code.

SYNOPSIS

       mummy [options] files...

DESCRIPTION

       mummy is a command line executable that generates C# wrappers from gccxml output. A C# class is generated to wrap the wrappable class named
       in the gccxml output. Settings to control the wrapping are given inline directly in the class header file or in the MummySettings.xml input
       file.

       mummy version 1.0.2 (revision 599)

       Command line options:

       --csharp-file opt
	      C# output file. Default value is 'ClassName.cs' in the current directory.

       --csharp-unit-test-file opt
	      C# output file. Default value is 'ClassNameUnitTest.cs' in the current directory.

       --export-layer-file opt
	      C++ output file. Default value is 'ClassNameEL.cxx' in the current directory.

       --gccxml-file opt
	      Input file (output of gccxml) describing class to be wrapped. Required.

       --help Display (this) detailed help information.

       --settings-file opt
	      Input file describing mummy configuration settings, including the set of wrapped classes.  Required.

       --suppress-warnings opt opt ...
	      Space separated list of warning numbers to suppress.

       --verbose
	      Overwhelm me with output, I don't have enough reading material... ;)

       --version
	      Display the program version.

AUTHORS

       This manual page was written by Mathieu Malaterre <malat@debian.org>, for the Debian project (and may be used by others).

SEE ALSO

       cableidx(1), gccxml(1).

mummy version 1.0.2 (revision 599)				   December 2011							  MUMMY(1)
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