Re: questions about coproc

[Grisha Levit]

On Thu, Mar 9, 2023, 14:34 Grisha Levit <grishalevit@gmail.com> wrote:

> On Thu, Mar 9, 2023, 13:48 Britton Kerin <britton.kerin@gmail.com> wrote:
>
>> 1.  no obvious way to propagate e.g. the die argument in the above
>> back to the controlling terminal.
>
>
> Maybe you mean something else by "propagate"
>

Oh, if you mean capturing the stderr output (without a temp file) you can
use another coproc for that.

$ coproc e { read -r && echo "$REPLY"; }
$ coproc c { echo err >&2; } 2>&${e[1]}
$ read -ru ${e[0]} && echo "$REPLY"
err

>