if( not 0
   || $args =~ /\-rs(\s+)(\S+)/x
#  || $args =~ /\-? (\s+)(\S+)/x
   || $args =~ /\-p (\s+)(\S+)/x
   || $args =~ /\-P (\s+)(\S+)/x
   ){ ... }

##</code><code>##

if( $args !~ / (*FAIL)
   | \-rs(\s+)(\S+) 
#  | \-? (\s+)(\S+)
   | \-P (\s+)(\S+)
   | \-p (\s+)(\S+)
   /x ){ ... }