oflag option in GNU dd - equivalent in FreeBSD dd ?

[RW]

On Tue, 23 Oct 2007 16:42:46 +0330
"Bahman M." <b.movaqar at adempiere.org> wrote:

> On 2007-10-22 Juri Mianovich wrote:
> > I am used to using this command in Linux, using GNU
> > dd:
> > 
> > dd if=/blah of=/bleh oflag=append conv=notrunc
> > 
> > The problem is, FreeBSD 'dd' does not understand the
> > "oflag" argument.
> > 
> > Is there some equivalent in the FreeBSD 'dd' syntax
> > that I can use, or am I forced to install GNU utils ?
> > 
> dd if=/blah of=/bleh conv=notrunc seek=`ls -s /bleh | cut -f1 -d ' '
> -`
> 
> I don't know if any simpler way is possible (anyone?).
> 

is it any different to 

dd if=/blah >> /bleh