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Full Discussion: How to use a function?
Top Forums UNIX for Dummies Questions & Answers How to use a function? Post 302731373 by Vitaly on Wednesday 14th of November 2012 11:07:25 PM
Old 11-15-2012
I changed my code

As you can see i must use "Usage:" as my function so i changed my code to fullfill the assignment but it doesn't seem its working correctly. I'm new to unix to the whole using function is confusing. This is the new code im trying in my script:

Code:
#Vitaly Kuzyanov
usage()
{
 [ $# -eq 0 ]
 echo "usage: $0 argument"
}
if usage
     then echo "Enter 1 or more arguments"
     else "There were $# arguments on the command line"
     exit 1
fi


Last edited by Scrutinizer; 11-15-2012 at 01:58 AM.. Reason: code tags
 

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Getopt::Long::Descriptive::Usage(3)			User Contributed Perl Documentation		       Getopt::Long::Descriptive::Usage(3)

NAME
Getopt::Long::Descriptive::Usage - the usage description for GLD VERSION
version 0.096 SYNOPSIS
use Getopt::Long::Descriptive; my ($opt, $usage) = describe_options( ... ); $usage->text; # complete usage message $usage->die; # die with usage message DESCRIPTION
This document only describes the methods of the Usage object. For information on how to use Getopt::Long::Descriptive, consult its documentation. METHODS
new my $usage = Getopt::Long::Descriptive::Usage->new(\%arg); You really don't need to call this. GLD will do it for you. Valid arguments are: options - an arrayref of options leader_text - the text that leads the usage; this may go away! text This returns the full text of the usage message. leader_text This returns the text that comes at the beginning of the usage message. option_text This returns the text describing the available options. warn This warns with the usage message. die This throws the usage message as an exception. $usage_obj->die(\%arg); Some arguments can be provided pre_text - text to be prepended to the usage message post_text - text to be appended to the usage message The "pre_text" and "post_text" arguments are concatenated with the usage message with no line breaks, so supply this if you need them. AUTHORS
o Hans Dieter Pearcey <hdp@cpan.org> o Ricardo Signes <rjbs@cpan.org> COPYRIGHT AND LICENSE
This software is copyright (c) 2005 by Hans Dieter Pearcey. This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself. perl v5.18.2 2013-10-04 Getopt::Long::Descriptive::Usage(3)
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