busybox

dd: exit with 1 if last write was incomplete

$ busybox dd if=/dev/zero of=/dev/loop0 bs=100M count=8; echo $?
8+0 records in
7+1 records out
805220352 bytes (767.9MB) copied, 0.464010 seconds, 1.6GB/s
1  <=========== FIXED

function                                             old     new   delta
write_and_stats                                       96      97      +1

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>