On 12/20/18 12:02 AM, Bize Ma wrote:
> Open a new terminal like xterm, change prompt to something like:
>
> PS1=' $SHLVL $ '
>
> Start a couple of bash subshells:
>
> 1 $ bash
> 2 $ bash
> 3 $ echo $$
> 9371
>
> Suspend the last one:
>
> 3 $ suspend
> [1]+ Stopped bash
> 2 $ echo $$
> 9313
> 2 $
>
> Make the suspended shell continue:
>
> 2 $ kill -CONT 9371
>
> The parent gets killed
>
> 1 $ echo $$
> 9034
> 1 $
The terminal ends up in the wrong process group, and the parent shell can't
do anything about it. You either get EOF on stdin, -1/EIO on the read, or a
SIGHUP.
--
``The lyf so short, the craft so long to lerne.'' - Chaucer
``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, UTech, CWRU [email protected] http://tiswww.cwru.edu/~chet/
