Perl Parsing Argument


 
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Old 05-16-2009
Perl Parsing Argument

i wanna passing an argument which read in a file or a set of files if the files are given in the command line, otherwise use STDIN if no file argument.
i got something like that, but it is not really working.
so can anyone help me? which one is better to use for and how? Use perl.

Thank you

Code:
use Getopt()::Long;
GetOptions( "file=s" => \$file );


Code:
$str = @ARGV ? $ARGV[0] : <STDIN>
chomp ($str = <STDIN>);

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UPDATE-METAINIT(1)					User Contributed Perl Documentation					UPDATE-METAINIT(1)

NAME
update-metainit - Generates init scripts SYNOPSIS
update-metainit [--remove initname [--purge] ] DESCRIPTION
Metainit solves the problem of writing good init scripts. Instead of manually creating these important files, they are derived from a declaritive description in the metainit files in /etc/metainit. These files can be shipped with packages or created by the local adminis- trator. If update-metainit called without argument, it will regenerate init scripts for all the files in /etc/metainit. The generated files contain a large warning in form of a comment that they will be overridden. Modifications are preferably done in the files in /etc/metainit and made effective by running update-metainit. If needed, the administrator can prevent modified init files by removing the warning comment. OPTIONS
--remove initname This command will remove any generated and non-modified scripts that were created by the metainit file with the name initname. --purge Only usable with --remove. Will remove the generated files even if modified. SEE ALSO
dh_metainit(1) AUTHOR
Joachim Breitner <nomeata@debian.org> perl v5.8.8 2007-07-30 UPDATE-METAINIT(1)