[Bug]: Error running scripts/setup-ubuntu.sh as root

[tareksander]

Problem description

The script errors out on line 222 because it tries to interpret "DEBIAN_FRONTEND=noninteractive" as a command when SUDO is an empty string. Maybe set SUDO to another command like env when run as root?

What steps will reproduce the bug?

Running scripts/setup-ubuntu.sh as root on Ubuntu 20.04.

What is the expected behavior?

The script runs without any error.

System information

This error occurs on Ubuntu 20.04, not on Termux.

[ghost]

Yes, env can be used there.

Reminding that running scripts as root can be bad idea. setup-ubuntu.sh uses whoami when setting ownership for sysroot:

termux-packages/scripts/setup-ubuntu.sh

Lines 244 to 245 in 3d62742

	$SUDO mkdir -p $TERMUX_PREFIX
	$SUDO chown -R $(whoami) /data

You can run into permission issues when attempting to build package as non-root.

Use of build-package.sh as root may lead to host system breakage. Had an incident with package perl where some files went into /usr instead of prefix, probably fixed in current version but not sure.