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Determining If You Are Running Interactively in bash
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Determining If You Are Running Interactively in bash

InfinityCoder January 11, 2017

You have some code you want to run only if you are (or are not) running interactively.

Use the following case statement:

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#!/usr/bin/env bash
# cookbook filename: interactive
 
case "$-" in
   *i*) # Code for interactive shell here
        ;;
   *) # Code for non-interactive shell here
      ;;
esac

$- is a string listing of all the current shell option flags. It will contain i if the shell is interactive.
You may also see code like the following (this will work, but the solution above is the preferred method):

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if [ "$PS1" ]; then
   echo This shell is interactive
else
   echo This shell is not interactive
fi

 

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