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3 Answers

How can I use Getopt::Long method if the input command execution is like this:

$ testcmd -option check ARG1 ARG2 ARG3

or

$ testcmd ARG1 ARG2 ARG3

perl getopt-long

edited Jun 30 '10 at 16:14 asked Jun 30 '10 at 11:04

2 That depends on what you want to have done with those options and flags. The people who answer below aretrying to make their best guess, but mind-reading is a difficult skill to master. Ether Jun 30 '10 at 16:15

A quick example:

#! /usr/bin/perl

use warnings;use strict;

use Getopt::Long;

sub usage { "Usage: $0 [--option=VALUE] ARG1 ARG2 ARG3\n" }

my $option = "default";

GetOptions("option=s", \$option) or die usage;

die usage unless @ARGV == 3;

print "$0: option=$option: @ARGV\n";

Getopt::Long is quite flexible in what it will accept:

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Greg Bacon53.5k 11 111 175

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$ ./cmdUsage: ./cmd [--option=VALUE] ARG1 ARG2 ARG3

$ ./cmd 1 2 3./cmd: option=default: 1 2 3

$ ./cmd --option=foo 4 5 6./cmd: option=foo: 4 5 6

$ ./cmd -option=bar 7 8 9./cmd: option=bar: 7 8 9

$ ./cmd -option check a b c./cmd: option=check: a b c

edited Jun 30 '10 at 11:38 answered Jun 30 '10 at 11:11

You need to enable the pass_through option. Documentation quoted below:

pass_through (default: disabled)

Options that are unknown, ambiguous or supplied with an invalid option value are passed through in@ARGV instead of being flagged as errors. This makes it possible to write wrapper scripts thatprocess only part of the user supplied command line arguments, and pass the remaining options tosome other program.

If require_order is enabled, options processing will terminate at the first unrecognized option, ornon-option, whichever comes first. However, if permute is enabled instead, results can becomeconfusing.

DVK's posted an example of how to do this in another answer. I'd upvote his answer first if you find ituseful.

edited Jun 30 '10 at 11:19 answered Jun 30 '10 at 11:12

+1 for recognizing that values starting with "-" need to be passed through DVK Jun 30 '10 at 13:28

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Rukmangathan1

#!/usr/bin/perl

use Getopt::Long;

my $cla = GetOptions ( "one=s" => \$one, "two=s" => \$two, "three=s" => \$three, "help|h|?" => \$help,) or usage ();

if ($help) { usage ();}

my $first = $one;my $second = $two;my $third = $three;

printf ("%-7s %-9s %-7s\n", $first, $second, $third);

sub usage { print "\n$0\t" . "[ -one -two -three ]\n\n"; exit (0);}

answered Nov 3 '13 at 2:52

Maybe you should add some sort of explanation to your code so it can be more useful. Meryovi Nov 3 '13 at14:25

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