When I did a for loop to start some background jobs
i.e
for ... do
command &
done &

when I type jobs, I can only see the for loop jobs, after the for loop
finishes, I can't see any jobs with the command jobs... I know the
"hidden" jobs are running since they are producing data... how can I
job control them?

Regards

Ben wrote:
> When I did a for loop to start some background jobs
> i.e
> for ... do
> command &
> done &
>
> when I type jobs, I can only see the for loop jobs, after the for loop
> finishes, I can't see any jobs with the command jobs... I know the
> "hidden" jobs are running since they are producing data... how can I
> job control them?
>
> Regards
>

run the loop in the foreground:

for ...
do
command &
done
jobs

--
Michael Tosch @ hp : com

In article <1179897190.132584.60250@u30g2000hsc.googlegroups. com>,
Ben <chinese.central@googlemail.com> wrote:

> When I did a for loop to start some background jobs
> i.e
> for ... do
> command &
> done &
>
> when I type jobs, I can only see the for loop jobs, after the for loop
> finishes, I can't see any jobs with the command jobs... I know the
> "hidden" jobs are running since they are producing data... how can I
> job control them?

A process can only control its child processes, not further descendant
processes. By putting the loop in the background you require a child
for the loop, and as a result all the commands run in grandchild
processes, which your original shell can't control.

If your system has the "pstree" command this is a way to see this
process hierarchy.

--
Barry Margolin, barmar@alum.mit.edu
Arlington, MA
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