ltffd-notify

#!/usr/bin/env bash

# Copyright (C) 2022 Patrick Pedersen, TUDO Makerspace

# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.

# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.

# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <https://www.gnu.org/licenses/>.

# Description: Displays a zenity notification to all users running a X11 session.

PATH=/usr/bin:/bin

TITLE="$1"
TEXT="$2"

# Notifies all users currently running a X11 session
# Credits: https://unix.stackexchange.com/a/307097
XUSERS=($(who|grep -E "\(:[0-9](\.[0-9])*\)"|awk '{print $1$NF}'|sort -u))
for XUSER in "${XUSERS[@]}"; do
    NAME=(${XUSER/(/ })
    DISPLAY=${NAME[1]/)/}
    DBUS_ADDRESS=unix:path=/run/user/$(id -u ${NAME[0]})/bus
    sudo -u ${NAME[0]} DISPLAY=${DISPLAY} \
                       DBUS_SESSION_BUS_ADDRESS=${DBUS_ADDRESS} \
                       PATH=${PATH} \
                       zenity --info --title "${TITLE}" --text "${TEXT}"
done