#!/command/with-contenv /usr/bin/bash
# shellcheck shell=bash

declare -r log_prefix="[custom-init]"

# Mostly borrowed from the LinuxServer.io base image
# https://github.com/linuxserver/docker-baseimage-ubuntu/tree/bionic/root/etc/cont-init.d
declare -r custom_script_dir="/custom-cont-init.d"

# Tamper checking.
# Don't run files which are owned by anyone except root
# Don't run files which are writeable by others
if [ -d "${custom_script_dir}" ]; then
	if [ -n "$(/usr/bin/find "${custom_script_dir}" -maxdepth 1 ! -user root)" ]; then
		echo "${log_prefix} **** Potential tampering with custom scripts detected ****"
		echo "${log_prefix} **** The folder '${custom_script_dir}' must be owned by root ****"
		exit 0
	fi
	if [ -n "$(/usr/bin/find "${custom_script_dir}" -maxdepth 1 -perm -o+w)" ]; then
		echo "${log_prefix} **** The folder '${custom_script_dir}' or some of contents have write permissions for others, which is a security risk. ****"
		echo "${log_prefix} **** Please review the permissions and their contents to make sure they are owned by root, and can only be modified by root. ****"
		exit 0
	fi

	# Make sure custom init directory has files in it
	if [ -n "$(/bin/ls --almost-all "${custom_script_dir}" 2>/dev/null)" ]; then
		echo "${log_prefix} files found in ${custom_script_dir} executing"
		# Loop over files in the directory
		for SCRIPT in "${custom_script_dir}"/*; do
			NAME="$(basename "${SCRIPT}")"
			if [ -f "${SCRIPT}" ]; then
				echo "${log_prefix} ${NAME}: executing..."
				/command/with-contenv /bin/bash "${SCRIPT}"
				echo "${log_prefix} ${NAME}: exited $?"
			elif [ ! -f "${SCRIPT}" ]; then
				echo "${log_prefix} ${NAME}: is not a file"
			fi
		done
	else
		echo "${log_prefix} no custom files found exiting..."
	fi
else
	echo "${log_prefix} ${custom_script_dir} doesn't exist, nothing to do"
fi