Re: [HACKERS] TODO list updated

> On Thu, 13 Jan 2000, Tom Lane wrote:
> 
> > Bruce Momjian <pgman@candle.pha.pa.us> writes:
> > >> You can't securely do
> > >> echo $PASSWORD | backend
> > >> or
> > >> echo $PASSWORD > allegedly-secure-temp-file
> > 
> > > This is secure.  echo is a shell builtin, and does not invoke a separate
> > > process with arguments.
> > 
> > echo is a builtin in ksh and derivatives, but I don't think it's safe
> > to assume it is a builtin everywhere...
> 
> bash-2.03$ which echo
> /usr/slocal/bin/echo
> 

which is an external program looking for another external program.  From
bash:
#$ type echoecho is a shell builtin#$ which which/usr/bin/which

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