Re: reading from external command

[Peng Yu]

I don't get how to modify the while-loop (with unnamed pipes in the
body) to get the exit code in the loop input unnamed pipe. Could you
make it clear by showing a working example? Thanks.

On 3/31/22, Chet Ramey <chet.ramey@case.edu> wrote:
> On 3/30/22 6:32 PM, Peng Yu wrote:
>> I am not sure how wait for "$!" would work robustly.
>
> You have to capture $! before it can be overwritten by another command. For
> instance, you can assign it to another variable.
>
>> In the following example, it can not get the error in the input.
>
> Because you didn't do that.
>
> --
> ``The lyf so short, the craft so long to lerne.'' - Chaucer
>                ``Ars longa, vita brevis'' - Hippocrates
> Chet Ramey, UTech, CWRU    chet@case.edu    http://tiswww.cwru.edu/~chet/
>


-- 
Regards,
Peng