Re: Sequential background tasks

["Gary R. Leaf" <grayflea@qx.net>]

T wrote:

> hi
>
> I find that in many cases I need my background tasks to be executed in
> sequence. Ie, I need background task-b to start right after background
> task-a has properly started. 
>
> So far I haven't found a good way to do it. I used
>
> task-a & sleep 2; task-b &
>
> but that 'sleep 2' has changed to 'sleep 5' and still sometimes task-b
> starts before task-a. I can raise the wait time, but it means that task-b
> would normally start too late... 
>
> Any good way? 
>
> thanks
Set up a script that checks the return codes.

if  return code of task A is 0 then
  task B
else
 do something else

if rturn code of task B is 0 then
  task C
else
  do something else

and so on

execute the controlling script in the background