Many years ago I wrote https://github.com/adh/random-tools/blob/master/byc.c https://github.com/adh/random-tools/blob/master/byc.c which tends to be the tool th

Many years ago I wrote https://github.com/adh/random-tools/blob/master/byc.c https://github.com/adh/random-tools/blob/master/byc.c which tends to be the tool that I use for copying images from/to block device (it was originally meant for something else which is why you need -p for it to do the right thing).