Re: Job control: process running from pipe doesn't get focus

[Chet Ramey]

On 12/15/23 12:28 PM, Maksym Telychko wrote:

> Bash Version: 5.2
> Patch Level: 21
> Release Status: release
>
> Description:
>         Process does not become foreground when run from a pipe.
>
> Repeat-By:
>      Conditions are very special, and I am not sure who in the chain is cause 
> of bug.
>
>      In short the bug in the following line, but it should executed not from a 
> running terminal emulator:
>          uxterm -e bash -c 'echo /etc/fstab | { FILE="$(cat)" ; sudoedit 
> "$FILE" ; }'
>      It line of script must be run automatically from the WM.
>
>      The chain to reproduce:
>      
>      | sway wm |     | uxterm    |     |  bash  ... sudoedit |
>      | i3 wm   | --> | alacritty |  -> |                     |
>      | weston  |     |           |     |                     |
>
>      swaywm config file:
>          exec_always uxterm -e bash -c 'echo /etc/fstab | { FILE="$(cat)" ; sudoedit 
> "$FILE" ; }'
>
>      If sudoedit running not from a pipe, it works good. Some of terminal 
> emulators do not reproduces
>      the problem, such as `foot` or `xfce4-terminal`.
>
>      The result of the chain is an editor isn't gain a focus and I cant type 
> anything.
>
>      Again, I'm not sure that is definetely bash, but could you please check 
> that. Thank you.

You might start by running a system call tracer like strace against the
sudoedit process or the bash process that's calling it and seeing what
they're doing.


--
``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/

OpenPGP_signature.asc
Description: OpenPGP digital signature