#!/bin/bash
# This script is part of Acronis Backup
# It is supported by Acronis only as part of the entire solution in accordance with http://www.acronis.com/support/eula-corp.html
# By using this script you accept the terms of the EULA http://www.acronis.com/support/eula-corp.html
# Use outside of the solution is done at your own risk and will not be supported by Acronis
# Contact http://www.acronis.com/en-us/support/ with any questions or concerns
# Copyright (C) 2020 Acronis

# args - USER GROUP_TO_ADD DIR_TO_ADJUST_ATTRS

USER="$1"; shift
GROUP_TO_ADD="$1"; shift
DIR_TO_ADJUST_ATTRS="$1"; shift

function check_user_exists()
{
  id "$1" &>/dev/null;
}

function check_group_exists()
{
  getent group "$1" &>/dev/null;
}

if [ -z "$USER" -o -z "$GROUP_TO_ADD" -o -z "$DIR_TO_ADJUST_ATTRS" ]; then
  exit 1
fi

check_user_exists "$USER"
if [ "$?" != "0" ]; then
  exit 1
fi

check_group_exists "$GROUP_TO_ADD"
if [ "$?" != "0" ]; then
  groupadd -f "$GROUP_TO_ADD"
  if [ "$?"  != "0" ]; then
    exit 1
  fi
fi

if [ ! -d "$DIR_TO_ADJUST_ATTRS" ]; then
  mkdir -m 770 -p "$DIR_TO_ADJUST_ATTRS"
  if [ "$?" != "0" ]; then
    exit 1
  fi
fi

usermod -a -G "$GROUP_TO_ADD" "$USER"
if [ "$?" != "0" ]; then
  exit 1
fi

chown -f "root.$GROUP_TO_ADD" "$DIR_TO_ADJUST_ATTRS"
if [ "$?" != "0" ]; then
  exit 1
fi

exit 0