How to make a shell script return 0 even after getting killed

Question

I have a scheduled shell script running in a distributed environment. There are some scenarios where the process might get killed by some other processes. But I need the process to return 0 even after the failure/killed. Is there anyway to implement it in bash?

Can you change how the script is called? I am thinking this should work. `( somescript.sh || true )` — Aaron Copley, Mar 23 '18 at 14:14
I know this will work but I can't start the process using this command. — pkgajulapalli, Mar 23 '18 at 14:16
Maybe you can use `trap` to exit 0 on any signal? Sorry, I am just spit-balling. — Aaron Copley, Mar 23 '18 at 14:22

score 1 · Answer 1 · answered Mar 23 '18 at 14:34

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Depends on the signal. Bash allows you to trap with the trap command, but if your script is being killed with SIGKILL (9), it is uninterruptible and untrappable.

answered Mar 23 '18 at 14:34

brent

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score 0 · Answer 2 · answered Mar 23 '18 at 15:09

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It sounds like this may be a case for some sort of watchdog process similar to how keepalived tracks processes.

At the simplest, the command pidof might be your friend here.

answered Mar 23 '18 at 15:09

JohnA

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How to make a shell script return 0 even after getting killed

2 Answers2