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I have a process running and I would like to know what it prints to stdout and stderr. On linux I would do

tail -f /proc/<pid>/fd/1

See here

How do I do this on macOS?

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  • Don't think you can. You could use screen/tmux but this would only works if you run one of them first.
    – nohillside
    Dec 22, 2022 at 15:00
  • That really is a shame. Thank you very much for the answer, though
    – User12547645
    Dec 22, 2022 at 15:37
  • It's not even possible on linux. Note this comment: unix.stackexchange.com/questions/58550/…. When you start the process you must output to a file, then you can tail -f <the file>.
    – Philip Couling
    Dec 22, 2022 at 16:16
  • +1 use screen to run the process and screen -x to also connect to the screen or just reconnect to it normally.
    – James Risner
    Dec 24, 2022 at 14:30

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