Re: How to pipe just stderr to stdin in a pipeline?

[Peng Yu]

That is not a pipeline. And, different from a pipeline, the status in
>(cmd) can not be gotten easily.

On Sun, May 10, 2020 at 8:27 AM Pierre Gaston <address@hidden> wrote:
>
> you could do : somecommand 2> >(othercommand)
>
> On Sun, May 10, 2020 at 6:14 AM Peng Yu <address@hidden> wrote:
>>
>> But this an external command which can not run bash functions by
>> definition. I need something native to bash.
>>
>> On 5/9/20, Pier Paolo Grassi <address@hidden> wrote:
>> > take also a look at pipexec:
>> >
>> > https://github.com/flonatel/pipexec
>> >
>> >
>> > Il giorno dom 10 mag 2020 alle 05:24 Peng Yu <address@hidden> ha
>> > scritto:
>> >
>> >> Thanks. The original stdout must be redirected back to stdout (see
>> >> "2>&1"). I have to use something like this to do it. This looks quite
>> >> cumbersome.
>> >>
>> >> $ { { echo error 1>&2; echo out; } 3>&1 1>&2 2>&3 | awk -e '{ print
>> >> "awk:", $0 }'; } 2>&1 | awk -e '{ print "awk2: " $0 }'
>> >> awk2: out
>> >> awk2: awk: error
>> >>
>> >> Is it better to add an operator similar to | and |& so that only
>> >> stderr is piped to stdin of the next command in the pipeline?
>> >>
>> >> On Sat, May 9, 2020 at 10:11 PM Pier Paolo Grassi
>> >> <address@hidden> wrote:
>> >> >
>> >> > I would use:
>> >> >
>> >> > {cmd1 3>&2 2>&1 1>&3 } | cmd2
>> >> >
>> >> > Il giorno dom 10 mag 2020 alle ore 05:04 Peng Yu <address@hidden>
>> >> ha scritto:
>> >> >>
>> >> >> | pipes stdout to stdin in a pipeline
>> >> >> |& pipes both stdout and stderr to stdin in a pipeline
>> >> >>
>> >> >> What is the best way to just pipe stderr (but not stdout) to stdin in
>> >> >> a pipeline? Thanks.
>> >> >>
>> >> >> --
>> >> >> Regards,
>> >> >> Peng
>> >> >>
>> >>
>> >>
>> >> --
>> >> Regards,
>> >> Peng
>> >>
>> > --
>> > Pier Paolo Grassi
>> >
>>
>>
>> --
>> Regards,
>> Peng
>>


-- 
Regards,
Peng