Debian update script

update

#!/usr/bin/sudo bash

main() {
    restart_if_required
    run_apt update
    run_apt full-upgrade
    run_apt autoremove
}

run_apt() {
    apt -y "$@" || error_exit "Failed to $@"
    restart_if_required
}

restart_if_required() {
    local check_file="/var/run/reboot-required"
    [[ -f "$check_file" ]] && {
        cat "$check_file"
        IFS= read -r -s -n 1 -t 5 -p "Press any key to abort in the next 5 seconds." key && {
            echo
            error_exit "Aborting"
        } || {
            echo
            reboot || error_exit "Failed to reboot"
        }
    }
}

error_exit() {
    echo "$1" >&2
    echo
    exit 1
}

set -m
trap "" SIGINT
main "$@"
exit 0