On 12/09/17 08:51, Barry Handelman wrote: > The iread function in dd.c issues a warning if the previous read was short, > suggesting that you use iflag=fullblock > > However, the warning is issued when the previous call to iread was partial, > so if only the final read was short then no warning is issued. > Importantly, this will always be the case when there was only one read, and > it was partial. > > I'd suggest that if the strategy of warning on subsequent reads is to be > used, the warning routine should be run once again after the final read.
The current approach was discussed at https://bugs.gnu.org/7362 A short read as the last read would be a common situation though? You're specifically looking for the following to warn? (echo; sleep 1; echo) | dd count=1 bs=512 That may be a bit aggressive as that could be used to read the current data available, up to a specified max. cheers, Pádraig.
