On Mon, 31 Oct 2005, Paul Eggert wrote:
It should still lseek and ftruncate, if stdout is a regular file, a
directory (!), or a shared memory object.
Otherwise I guess it has to write null bytes, yes.
What about special files ? lseek is valid on e.g. /dev/hda and people
would not expect dd to null their data till it reached the desired offset.
Perhaps dd should output null bytes only on FIFOs ?
On a relative matter, what should dd do in the following case:
$ echo -n AB > f
$ echo -n ab | dd bs=1 seek=1 >> f
What should the contents of `f' be ?
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