i've just found a bug in "dd". by mistakes i used the same input and output file. dd said it wrote 0 bytes, but what it actually did is overwrite the file and setting it back to zero. doing so, dd deleted a 4.3G file in a fraction of a blink.
luckily i can download the file again. but before it took me 2 hours to download this file. now i have to download it again, wait for another 2 hours and i can't work for this time. 2 hours for a little mistake. 4 hours time loss! this can't happen. mistakes happen. by simple logics it doesn't make sense to delete a file, just because input and output file are the same. also there is barely anything easier to check for. please find some solution for it. if it is intentional, make an option for it. this way you can also shorten the command. otherwise if input and output are the same, warn the user!
