GetBucketPolicy

user@host % aws s3api get-bucket-policy --bucket pubreadbuc

{
    "Policy": "{\n    
        \"Version\": \"2012-10-17\",\n    
        \"Statement\": [\n        
            {\n            
                \"Sid\": \"PublicReadGetObject\",\n
                \"Effect\": \"Allow\",\n
                \"Principal\": \"*\",\n
                \"Action\": \"s3:GetObject\",\n
                \"Resource\": \"arn:aws:s3:::pubreadbuc *\"\n
            }\n    
        ]\n
    }\n
\n"
}