This is a simple bash script that when given an ENI identifier and an AWS region will find if there are any Lambda functions currently using the specified ENI.

Requirements:

• The jq library
• The AWS CLI
• An IAM role configured with the AWS CLI that has permissions to query Lambda and EC2/VPC/ENIs

Arguements:

• --eni the id of the ENI to check, required
• --region the region to search lambda for, required