RESULTS from adding unix groups

Bob Lenk rml at hpfcdc.HP.COM
Tue Sep 13 09:51:57 AEST 1988


> This confirms that `dd bs=N' and `dd ibs=N obs=N' do different things.

When you think about it, this really has to be the case.  If "bs=N" is
to avoid internal copying, it has little choice about how to handle
reads shorter than of K ( < N ) bytes.  It could write K bytes, or it
could attempt to read N-K bytes before doing a write.  Neither is
equivalent to "ibs=N obs=N".  Arguably the latter behavior would be
preferable, since it is clear that the input block size is not an
absolute.  The manual page should point this out.

		Bob Lenk
		hplabs!hpfcla!rml
		rml%hpfcla at hplabs.hp.com



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