multithreading - BASH: Run two commands in parallel and wait for the second one to finish -

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i have 2 commands, 1 logging things in background , won't stop until kill , second 1 stop.

let's mark them , b respectively.

i want execute:

  • a , b in parallel
  • wait b finish
  • kill a
  • [do more stuff]

and repeat in loop.

i'm running on macos , can't update bash 4.x because of gplv3.

preferably (the logger) start first wouldn't mind if it's undefined or b start first since difference in time negligible.

help appreciated.

thanks


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