Thanks ikegami for your explanation, actually my script run on linux and it parse data which it get from windows registry. This input data dont follow logic and can be simple malicious. I cannot use any of Win32 modules which using XS part. The command is ambiguous because it intend to be ambiguous to misslead users and standard programs like antiviruses etc.

right now I stick to: 
sub find_parameters {
    my $input = $_[0];
    if($input =~ /^(.+?\.\w{3})$/){
        print "only one executable: $input\n";
    }elsif($input =~ /^(.+?\.\w{3})( +)([\/\-].+)$/ && -f $1 ){
        print "$1 with parameters $3\n";
    }elsif($input =~ /^“(.+)”$/){
                # strip quotes and parse again
        find_parameters($1);
    }else{
        print "not parsed: $input\n";
    };
};

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In reply to Re^4: Using regex to separate parameters by resistance
in thread Using regex to separate parameters by resistance

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