tag 15680 notabug close 15680 stop On 10/22/2013 07:47 AM, Bernhard Voelker wrote: > dd(1) issues a nice warning about short reads ... > > src/dd if=/dev/random of=sample bs=1000 count=2 > src/dd: warning: partial read (128 bytes); suggest iflag=fullblock > 0+2 records in > 0+2 records out > 256 bytes (256 B) copied, 0.000423371 s, 605 kB/s > > ... but only if count was > 1: > > src/dd if=/dev/random of=sample bs=1000 count=1 > 0+1 records in > 0+1 records out > 128 bytes (128 B) copied, 0.000270231 s, 474 kB/s > > Is this by intension or an off-by-one? > I'd like to provide a patch in the latter case.
The various cases for warning were disucussed at: http://bugs.gnu.org/7362 Also I mentioned this particular case with count at: http://bugs.gnu.org/9734#18 Copying from there... "Note the particular case where count=1 is not warned about, as with a single read, one doesn't know if we're just at EOF. Also it's probably a quite common idiom to, consume available data up to $bs bytes." thanks, Pádraig.
