the | true is the.last pipe
while witbout , its.one cmd less
the | true is $pipestatus[1][*]
On Tue, Dec 10, 2024, 4:31 AM Dale R. Worley <wor...@alum.mit.edu> wrote:
> Andreas Schwab <sch...@linux-m68k.org> writes:
> >> But the PIPESTATUS refers to the 'false' pipeline:
> >> $ if false; then :; fi; echo ${PIPESTATUS[*]}
> >> 1
> >
> > $ if false; then :; fi | true; echo ${PIPESTATUS[*]}
> > 0 0
> >
> > Why is that not `1 0'? After all, the last executed commands as part of
> > the pipeline (by your reasoning) are `false' and `true'.
>
> It looks complicated:
>
> $ if false; then :; fi | true; echo ${PIPESTATUS[*]}
> 0 0
> $ if false; then :; fi | true; echo $?
> 0
> $ if false; then :; fi ; echo ${PIPESTATUS[*]}
> 1
> $ if false; then :; fi ; echo $?
> 0
>
> I'm sure there's an explanation, but I'm not feeling up to spelunking
> through the documentation enough to figure it out.
>
> Dale
>
>
