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

[Pierre Gaston]

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
>
>