Why does my Perl program print the help message when an arguments has 0 as a value?

Posted by David on Stack Overflow See other posts from Stack Overflow or by David
Published on 2010-03-10T15:07:18Z Indexed on 2010/03/28 19:23 UTC
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If i do this:

GetOptions(
    'u=s'    => \$in_username,
    'r=i'   => \$in_readonly,
    'b=i' => \$in_backup
    );

exit usage() unless $in_username && $in_readonly && $in_backup;

and call the program like this:

./app.pl -u david -r 12 -b 0

it always results in calling usage(), so obviously the 0 is not seen as an integer value. What can i do accept integer values AND 0?

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