From 52bb985d88984204bccc115b8bd03de0e1603ee6 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?E=CC=81ric=20Gaspar?=
 <46165813+ericgaspar@users.noreply.github.com>
Date: Thu, 28 Dec 2023 10:53:04 +0100
Subject: [PATCH] Create netdata-uninstaller.sh

---
 conf/netdata-uninstaller.sh | 333 ++++++++++++++++++++++++++++++++++++
 1 file changed, 333 insertions(+)
 create mode 100644 conf/netdata-uninstaller.sh

diff --git a/conf/netdata-uninstaller.sh b/conf/netdata-uninstaller.sh
new file mode 100644
index 0000000..cfd858c
--- /dev/null
+++ b/conf/netdata-uninstaller.sh
@@ -0,0 +1,333 @@
+#!/usr/bin/env bash
+#shellcheck disable=SC2181
+#
+# This is the netdata uninstaller script
+# Variables needed by script and taken from '.environment' file:
+#  - NETDATA_PREFIX
+#  - NETDATA_ADDED_TO_GROUPS
+#
+# Copyright: SPDX-License-Identifier: GPL-3.0-or-later
+#
+# Author: Paul Emm. Katsoulakis <paul@netdata.cloud>
+#
+
+usage="$(basename "$0") [-h] [-f ] -- program to calculate the answer to life, the universe and everything
+
+where:
+    -e, --env    path to environment file (defauls to '/etc/netdata/.environment'
+    -f, --force  force uninstallation and do not ask any questions
+    -h           show this help text
+    -y, --yes    flag needs to be set to proceed with uninstallation"
+
+FILE_REMOVAL_STATUS=0
+ENVIRONMENT_FILE="/etc/netdata/.environment"
+INTERACTIVITY="-i"
+YES=0
+while :; do
+	case "$1" in
+	-h | --help)
+		echo "$usage" >&2
+		exit 1
+		;;
+	-f | --force)
+		INTERACTIVITY="-f"
+		shift
+		;;
+	-y | --yes)
+		YES=1
+		shift
+		;;
+	-e | --env)
+		ENVIRONMENT_FILE="$2"
+		shift 2
+		;;
+	-*)
+		echo "$usage" >&2
+		exit 1
+		;;
+	*) break ;;
+	esac
+done
+
+if [ "$YES" != "1" ]; then
+	echo >&2 "This script will REMOVE netdata from your system."
+	echo >&2 "Run it again with --yes to do it."
+	exit 1
+fi
+
+if [[ $EUID -ne 0 ]]; then
+	echo >&2 "This script SHOULD be run as root or otherwise it won't delete all installed components."
+	key="n"
+	read -r -s -n 1 -p "Do you want to continue as non-root user [y/n] ? " key
+	if [ "$key" != "y" ] && [ "$key" != "Y" ]; then
+		exit 1
+	fi
+fi
+
+# -----------------------------------------------------------------------------
+
+setup_terminal() {
+	TPUT_RESET=""
+	TPUT_YELLOW=""
+	TPUT_WHITE=""
+	TPUT_BGRED=""
+	TPUT_BGGREEN=""
+	TPUT_BOLD=""
+	TPUT_DIM=""
+
+	# Is stderr on the terminal? If not, then fail
+	test -t 2 || return 1
+
+	if command -v tput 1>/dev/null 2>&1; then
+		if [ $(($(tput colors 2>/dev/null))) -ge 8 ]; then
+			# Enable colors
+			TPUT_RESET="$(tput sgr 0)"
+			TPUT_YELLOW="$(tput setaf 3)"
+			TPUT_WHITE="$(tput setaf 7)"
+			TPUT_BGRED="$(tput setab 1)"
+			TPUT_BGGREEN="$(tput setab 2)"
+			TPUT_BOLD="$(tput bold)"
+			TPUT_DIM="$(tput dim)"
+		fi
+	fi
+
+	return 0
+}
+setup_terminal || echo >/dev/null
+
+run_ok() {
+	printf >&2 "${TPUT_BGGREEN}${TPUT_WHITE}${TPUT_BOLD} OK ${TPUT_RESET} ${*} \n\n"
+}
+
+run_failed() {
+	printf >&2 "${TPUT_BGRED}${TPUT_WHITE}${TPUT_BOLD} FAILED ${TPUT_RESET} ${*} \n\n"
+}
+
+ESCAPED_PRINT_METHOD=
+printf "%q " test >/dev/null 2>&1
+[ $? -eq 0 ] && ESCAPED_PRINT_METHOD="printfq"
+escaped_print() {
+	if [ "${ESCAPED_PRINT_METHOD}" = "printfq" ]; then
+		printf "%q " "${@}"
+	else
+		printf "%s" "${*}"
+	fi
+	return 0
+}
+
+run_logfile="/dev/null"
+run() {
+	local user="${USER--}" dir="${PWD}" info info_console
+
+	if [ "${UID}" = "0" ]; then
+		info="[root ${dir}]# "
+		info_console="[${TPUT_DIM}${dir}${TPUT_RESET}]# "
+	else
+		info="[${user} ${dir}]$ "
+		info_console="[${TPUT_DIM}${dir}${TPUT_RESET}]$ "
+	fi
+
+	printf >>"${run_logfile}" "${info}"
+	escaped_print >>"${run_logfile}" "${@}"
+	printf >>"${run_logfile}" " ... "
+
+	printf >&2 "${info_console}${TPUT_BOLD}${TPUT_YELLOW}"
+	escaped_print >&2 "${@}"
+	printf >&2 "${TPUT_RESET}\n"
+
+	"${@}"
+
+	local ret=$?
+	if [ ${ret} -ne 0 ]; then
+		run_failed
+		printf >>"${run_logfile}" "FAILED with exit code ${ret}\n"
+	else
+		run_ok
+		printf >>"${run_logfile}" "OK\n"
+	fi
+
+	return ${ret}
+}
+
+portable_del_group() {
+	local groupname="${1}"
+
+	# Check if group exist
+	echo >&2 "Removing ${groupname} user group ..."
+
+	# Linux
+	if command -v groupdel 1>/dev/null 2>&1; then
+		run groupdel -f "${groupname}" && return 0
+	fi
+
+	# mac OS
+	if command -v dseditgroup 1> /dev/null 2>&1; then
+		if dseditgroup -o read netdata 1> /dev/null 2>&1; then
+			run dseditgroup -o delete "${groupname}" && return 0
+		else
+			echo >&2 "Could not find group ${groupname}, nothing to do"
+		fi
+	fi
+
+	echo >&2 "Group ${groupname} was not automatically removed, you might have to remove it manually"
+	return 1
+}
+
+portable_del_user() {
+	local username="${1}"
+	echo >&2 "Deleting ${username} user account ..."
+
+	# Linux
+	if command -v userdel 1>/dev/null 2>&1; then
+		run userdel -f "${username}" && return 0
+	fi
+
+	# mac OS
+	if command -v sysadminctl 1>/dev/null 2>&1; then
+		run sysadminctl -deleteUser "${username}" && return 0
+	fi
+
+	echo >&2 "User ${username} could not be deleted from system, you might have to remove it manually"
+	return 1
+}
+
+portable_del_user_from_group() {
+	local groupname="${1}" username="${2}"
+
+	# username is not in group
+	echo >&2 "Deleting ${username} user from ${groupname} group ..."
+
+	# Linux
+	if command -v gpasswd 1>/dev/null 2>&1; then
+		run gpasswd -d "netdata" "${group}" && return 0
+	fi
+
+	# FreeBSD
+	if command -v pw 1>/dev/null 2>&1; then
+		run pw groupmod "${groupname}" -d "${username}" && return 0
+	fi
+
+	# BusyBox
+	if command -v delgroup 1>/dev/null 2>&1; then
+		run delgroup "${username}" "${groupname}" && return 0
+	fi
+
+	# mac OS
+	if command -v dseditgroup 1> /dev/null 2>&1; then
+		run dseditgroup -o delete -u "${username}" "${groupname}" && return 0
+	fi
+
+	echo >&2 "Failed to delete user ${username} from group ${groupname} !"
+	return 1
+}
+
+quit_msg() {
+	echo
+	if [ "$FILE_REMOVAL_STATUS" -eq 0 ]; then
+		echo >&2 "Something went wrong :("
+	else
+		echo >&2 "Netdata files were successfully removed from your system"
+	fi
+}
+
+user_input() {
+	TEXT="$1"
+	if [ "${INTERACTIVITY}" == "-i" ]; then
+		read -r -p "$TEXT" >&2
+	fi
+}
+
+rm_file() {
+	FILE="$1"
+	if [ -f "${FILE}" ]; then
+		run rm -v ${INTERACTIVITY} "${FILE}"
+	fi
+}
+
+rm_dir() {
+	DIR="$1"
+	if [ -n "$DIR" ] && [ -d "$DIR" ]; then
+		user_input "Press ENTER to recursively delete directory '$DIR' > "
+		run rm -v -f -R "${DIR}"
+	fi
+}
+
+netdata_pids() {
+	local p myns ns
+	myns="$(readlink /proc/self/ns/pid 2>/dev/null)"
+	for p in \
+		$(cat /var/run/netdata.pid 2>/dev/null) \
+		$(cat /var/run/netdata/netdata.pid 2>/dev/null) \
+		$(pidof netdata 2>/dev/null); do
+
+		ns="$(readlink "/proc/${p}/ns/pid" 2>/dev/null)"
+		#shellcheck disable=SC2002
+		if [ -z "${myns}" ] || [ -z "${ns}" ] || [ "${myns}" = "${ns}" ]; then
+			name="$(cat "/proc/${p}/stat" 2>/dev/null | cut -d '(' -f 2 | cut -d ')' -f 1)"
+			if [ "${name}" = "netdata" ]; then
+				echo "${p}"
+			fi
+		fi
+	done
+}
+
+trap quit_msg EXIT
+
+#shellcheck source=/dev/null
+source "${ENVIRONMENT_FILE}" || exit 1
+
+#### STOP NETDATA
+echo >&2 "Stopping a possibly running netdata..."
+for p in $(netdata_pids); do
+	i=0
+	while kill "${p}" 2>/dev/null; do
+		if [ "$i" -gt 30 ]; then
+			echo >&2 "Forcefully stopping netdata with pid ${p}"
+			run kill -9 "${p}"
+			run sleep 2
+			break
+		fi
+		sleep 1
+		i=$((i + 1))
+	done
+done
+sleep 2
+
+#### REMOVE NETDATA FILES
+rm_file /etc/logrotate.d/netdata
+rm_file /etc/systemd/system/netdata.service
+rm_file /lib/systemd/system/netdata.service
+rm_file /usr/lib/systemd/system/netdata.service
+rm_file /etc/init.d/netdata
+rm_file /etc/periodic/daily/netdata-updater
+rm_file /etc/cron.daily/netdata-updater
+
+if [ -n "${NETDATA_PREFIX}" ] && [ -d "${NETDATA_PREFIX}" ]; then
+	rm_dir "${NETDATA_PREFIX}"
+else
+	rm_file "/usr/sbin/netdata"
+	rm_dir "/usr/share/netdata"
+	rm_dir "/usr/libexec/netdata"
+	rm_dir "/var/lib/netdata"
+	rm_dir "/var/cache/netdata"
+	rm_dir "/var/log/netdata"
+	rm_dir "/etc/netdata"
+fi
+
+FILE_REMOVAL_STATUS=1
+
+#### REMOVE NETDATA USER FROM ADDED GROUPS
+if [ -n "$NETDATA_ADDED_TO_GROUPS" ]; then
+	user_input "Press ENTER to delete 'netdata' from following groups: '$NETDATA_ADDED_TO_GROUPS' > "
+	for group in $NETDATA_ADDED_TO_GROUPS; do
+		portable_del_user_from_group "${group}" "netdata"
+	done
+fi
+
+#### REMOVE USER
+user_input "Press ENTER to delete 'netdata' system user > "
+portable_del_user "netdata" || :
+
+### REMOVE GROUP
+user_input "Press ENTER to delete 'netdata' system group > "
+portable_del_group "netdata" || :