axos-reboot-required

#!/bin/bash

## Copyright (C) 2024 Ardox

# Avoid unnecessary reboots: don't notify if an updated package is
# - not currently running (e.g. alternative kernel)
# - not in use (e.g. alternative driver)

## Colors ----------------------------

# Text Reset
Color_Off='\033[0m'

# Bold Colors
BBlack='\033[1;30m' BRed='\033[1;31m'    BGreen='\033[1;32m' BYellow='\033[1;33m'
BBlue='\033[1;34m'  BPurple='\033[1;35m' BCyan='\033[1;36m'  BWhite='\033[1;37m'

## -----------------------------------

_notify_reboot_required() {
    local xx

    for xx in "$XDG_CURRENT_DESKTOP"; do
        if [[ -n "$xx" ]] ; then
            break
        fi
    done

    if [[ -n "$xx" ]] ; then
        local user userid cmd

        for user in $(/usr/bin/users) ; do
            userid=$(/usr/bin/id -u $user)
            cmd=(DISPLAY=:0 DBUS_SESSION_BUS_ADDRESS=unix:path=/run/user/$userid/bus /usr/bin/notify-send)
            cmd+=(--icon=system-reboot --urgency=critical)
            cmd+=("\"Core system package upgraded, You need to reboot the machine.\"")
            /usr/bin/su $user -c "${cmd[*]}"
        done
    else
        # at TTY
		echo -e ${BRed}"\n[AxOS] Core system package upgraded, You need to reboot the machine.\n"${Color_Off} >&2
    fi
}

RunningKernel() {
    cat /proc/cmdline | sed 's|.*/vmlinuz-\(linux[a-z0-9-]*\) .*|\1|'
}

main() {
    local targets=$(tee /dev/null)  # targets from the hook (stdin)
    local target
    local notify=no
    local runningKernel="$(RunningKernel)"

    for target in $targets ; do
        case "$target" in
            linux | linux-lts | linux-zen | linux-hardened | linux-lts?? | linux-lts???)
                # Note: only official and older LTS kernels are checked.
                if [[ "$target" = "$runningKernel" ]] ; then
                    notify=yes
                    break
                fi
                ;;
            nvidia)
                if [[ "$runningKernel" = "linux" ]] ; then
                    notify=yes
                    break
                fi
                ;;
            nvidia-lts)
                if [[ "$runningKernel" = "linux-lts" ]] ; then
                    notify=yes
                    break
                fi
                ;;
            btrfs-progs)
                if [[ -n "$(/usr/bin/df -hT | awk '{print $2}' | grep -w btrfs)" ]] ; then
                    notify=yes
                    break
                fi
                ;;
            *)
                notify=yes
                break
                ;;
        esac
    done

    if [[ "$notify" = "yes" ]] ; then
		_notify_reboot_required
		unset -f _notify_reboot_required
    fi
}

main "$@"