Also you can waste one line of code for making first conditional to have the same line-format as others: 
if( not 0
   || $args =~ /\-rs(\s+)(\S+)/x
#  || $args =~ /\-? (\s+)(\S+)/x
   || $args =~ /\-p (\s+)(\S+)/x
   || $args =~ /\-P (\s+)(\S+)/x
   ){ ... }

[download]
...or equivalently inside regex: 
if( $args !~ / (*FAIL)
   | \-rs(\s+)(\S+) 
#  | \-? (\s+)(\S+)
   | \-P (\s+)(\S+)
   | \-p (\s+)(\S+)
   /x ){ ... }

[download]
edit: not equivalently, because there are 8 capturing groups instead of 2 :)

Of course regex can be simplyfied as AnomalousMonk have shown here Re: regex return true instead of false.

In reply to Re^5: regex return true instead of false (precedence) by rsFalse
in thread regex return true instead of false by ovedpo15

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