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#    nonsense to know the file size

...
    print $len."\n";
    exit 1;
}

     $len = -s $file;  # not length($file)

if(($ARGV[2]=~m/-t/)==1){
    $MAX_SIZE_PART=substr($ARGV[2],2);    
}

if ( $ARGV[2] =~ /^-t(\d+)/ ) {
    $MAX_SIZE_PART = $1;
} else {
    die "Usage: blah blah\n";
}