proxy_install.sh

#!/bin/sh

here=$(dirname "$0")
working_directory="$1"

config_file_name="proxy.cfg"
set_enforce_script_name="setenforce.sh"
proxy_service_file_name="proxy.service"
proxy_update_execute_script_name="proxy_update_execute.sh"
load_configuration_script_name="proxy_load_configuration.sh"

config_file="$working_directory/$config_file_name"
config_file_source="$here/Proxy/$config_file_name"
set_enforce_script="$here/$set_enforce_script_name"
proxy_service="$working_directory/$proxy_service_file_name"
load_configuration_script="$here/$load_configuration_script_name"
proxy_update_execute_script="$here/$proxy_update_execute_script_name"

if test -e "$working_directory"; then

  echo "Working directory is ready"
else

  if mkdir -p "$working_directory"; then

    echo "$working_directory: working directory has been created"
  else

    echo "ERROR: $working_directory working directory was not created"
    exit 1
  fi
fi

if test -e "$config_file"; then

  if ! rm -f "$config_file"; then

    echo "ERROR: $config_file could not be removed"
    exit 1
  fi
fi

if ! test -e "$config_file_source"; then

  echo "ERROR: $config_file_source does not exist"
  exit 1
fi

if mv "$config_file_source" "$config_file" &&
  test -e "$config_file" && chmod 640 "$config_file"; then

  echo "$config_file: proxy configuration file saved"
else

  echo "ERROR: $config_file proxy configuration file not saved"
  exit 1
fi

if ! test -e "$load_configuration_script"; then

  echo "ERROR: $load_configuration_script does not exist"
  exit 1
fi


# shellcheck disable=SC1090
. "$load_configuration_script"
load_configuration "$config_file"

# shellcheck disable=SC2154
if [ -z "$host" ]; then

  if [ -z "$hostFallback" ]; then

    echo "No Proxy configuration provided"
    exit 0
  fi
fi

msg1="Initializing Proxy for the first time"
# shellcheck disable=SC2154
msg2="Proxy init. parameters (1): (host=$host, hostFallback=$hostFallback, port=$port, account=$account, password=$password)"
# shellcheck disable=SC2154
msg3="Proxy init. parameters (2): (working_directory=$working_directory, log=$log)"
# shellcheck disable=SC2154
msg4="Proxy init. parameters (3): (certificate_endpoint=$certificate_endpoint, frequency=$frequency)"
# shellcheck disable=SC2154
msg5="Proxy init. parameters (4): (home=$home, behavior_get_ip=$behavior_get_ip, is_factory_service=$FACTORY_SERVICE)"

echo "$msg1"
echo "$msg2"
echo "$msg3"
echo "$msg4"
echo "$msg5"

if test -e "$log"; then

  if rm -f "$log"; then

    echo "$log: has been removed"
  else

    echo "WARNING: $log has not been removed"
  fi
fi

if ! test -e "$proxy_update_execute_script"; then

  echo "ERROR: $proxy_update_execute_script does not exist"
  exit 1
fi

validate_ip_script="$here/validate_ip_address.sh"
if ! test -e "$validate_ip_script"; then

  echo "ERROR: $validate_ip_script does not exist"
  exit 1
fi

if [ -z "$FACTORY_SERVICE" ]; then

  echo "Proxy update execution will be logged to: $log"
else

  echo "Proxy update execution will be logged to standard output"
  log="/dev/stdout"
fi

export PROXY_HOST_FALLBACK="$hostFallback"

# shellcheck disable=SC2154,SC2129
if sh "$proxy_update_execute_script" "$working_directory" "$host" "$port" \
  "$account" "$password" "$certificate_endpoint" "$log" "$behavior_get_ip"; then

  echo "Proxy has been initialized for the first time"
else

  echo "ERROR: Could not initialize proxy for the first time"
  if test "$here"/Proxy/"$proxy_service_file_name"; then

    rm -f "$here"/Proxy/"$proxy_service_file_name"
  fi
  exit 1
fi

if test -e "$proxy_service"; then

  if ! rm -f "$proxy_service"; then

    echo "ERROR: $proxy_service could not be removed"
    exit 1
  fi
fi

systemd_service="/etc/systemd/system/$proxy_service_file_name"
if test -e systemd_service; then

  echo "$systemd_service already exists, cleaning up"

  if systemctl stop $proxy_service_file_name &&
    systemctl disable $proxy_service_file_name >/dev/null 2>&1; then

    echo "$systemd_service stopped and disabled"
  fi

  if rm -f "$systemd_service"; then

    echo "$systemd_service removed"
  else

    echo "ERROR: $systemd_service could not be removed"
    exit 1
  fi
fi

if sh "$validate_ip_script" "$host" >/dev/null 2>&1; then

  echo "Proxy host is IP address: $host"
else

  if [ -z "$FACTORY_SERVICE" ]; then

    if mv "$here"/Proxy/"$proxy_service_file_name" "$proxy_service" &&
      test -e "$proxy_service" && chmod 640 "$proxy_service"; then

      echo "$proxy_service: proxy service file saved"
      if ! test -e "$set_enforce_script"; then

        echo "ERROR: $set_enforce_script does not exits"
        exit 1
      fi

      if cp "$proxy_service" "$systemd_service"; then

        echo "$systemd_service is ready"
      else

        echo "ERROR: $proxy_service could not be created"
        exit 1
      fi

      if "$set_enforce_script" >/dev/null 2>&1 &&
        systemctl enable "$proxy_service_file_name" &&
        systemctl start "$proxy_service_file_name"; then

        if systemctl status "$proxy_service_file_name" | grep running >/dev/null 2>&1; then

          echo "Proxy service started"
        else

          echo "ERROR: Proxy service is not running"
          exit 1
        fi

        selinux_config_path="/etc/selinux"
        selinux_config="$selinux_config_path/config"
        selinux_config_backup="$selinux_config_path/config.bak"

        if sestatus | grep -i "disabled" >/dev/null 2>&1; then

          echo "SELinux is already disabled"
        else

          if test -e "$selinux_config"; then

            if ! test -e "$selinux_config_backup"; then

              echo "$selinux_config: backing up"
              if ! mv "$selinux_config" "$selinux_config_backup"; then

                echo "ERROR: $selinux_config could not backup"
                exit 1
              fi
            fi

            if echo "SELINUX=disabled" >"$selinux_config" &&
              echo "SELINUXTYPE=targeted" | tee -a "$selinux_config" >/dev/null 2>&1; then

              echo "SELinux is disabled"
            else

              echo "ERROR: Could not disable SELinux"
            fi
          else

            echo "WARNING: $selinux_config not found"
          fi
        fi
      else

        echo "ERROR: Could not start proxy service"
        exit 1
      fi
    else

      echo "ERROR: $proxy_service proxy service file not saved"
      exit 1
    fi
  fi
fi