Self-elevating a script to root permissions

Trick to elevate a script to root permissions

FeedbackBy Preston Hunt, 05 November 2011

I don't know why it took me so long to figure this out, but here is a nice little recipe for elevating a script to root permissions from inside the script.

#!/usr/bin/env bash

if (( UID != 0 )); then
    echo Re-running as root
    exec sudo -E "$0" ${1+"$@"}
fi

echo Script is running as root
echo Here are my arguments:
for i in "$@"; do echo arg=[$i]; done
id

If you don't want to export the user's environment variables, replace "sudo -E" with "sudo".