CODEWITHSUNDEEP
bashreturnexit
Endogen
Endogen

Reputation: 651

bash: return from program execution but close program after exiting script

I would like to execute a bash script on my Mac that will start the command line program caffeinate. But if i start it like this:

#!/bin/bash
caffeinate

It will not return and the terminal will be blocked. That's not what i want. But on the other hand, if i close the terminal the program should also exit. How can i achieve that?

I already tried to play around with return and exit but couldn't get what i wanted.

Upvotes: 1

Views: 1530

Answers (2)

Fred
Fred

Reputation: 6995

Try something like :

#!/bin/bash
trap 'kill -TERM $caffeinate_pid' EXIT
caffeinate &
caffeinate_pid=$!

This script will need to be sourced (with source or .) so that the trap is in the context of the calling shell (the termination of which you want to use to trigger termination of caffeinate).

Upvotes: 1

chrstphrchvz
chrstphrchvz

Reputation: 727

This is caused by Terminal.app, where the existing workarounds are to go into Terminal's preferences and set "When the shell exits:" to "Close window", and either setting "Ask before closing:" to "Never" or "Only if there are other processes other then the login shell and:" and adding your program to the list of programs that don't prompt the user when closing the window.(Not sure the second part works for scripts, nor whether there is a more universal workaround using more bash and AppleScript code so that an end user need not change any preferences.)

Upvotes: 0

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