Shell Script What can check if this was set when called

Question

I wrote a script that relies on other server responses (uses Wget to retrieve data), and I want to always run in the background without a doubt. I know that one solution is to simply write a shell script that will call my script with & added, but I want to avoid this mess.

Is there a way for the bash (or zsh) script to determine if it was called using. /foo.sh&, and if not, exit and restart it yourself?

Thanks everyone!

Answer 1

I don’t know how to do this, but you can set the variable in the parent script and check it in child:

if [[ -z "$_BACKGROUNDED" ]] ; then
    _BACKGROUNDED=1 exec $0 $@ & exit
fi
# Put code here

bash, zsh.

Answer 2

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esac

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Answer 3

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Answer 4

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Answer 5

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