archboot/usr/bin/archboot-clock.sh

#!/usr/bin/env bash
# SPDX-License-Identifier: GPL-2.0-only
# written by Tobias Powalowski <tpowa@archlinux.org>
_ANSWER="/tmp/.clock"
_RUNNING_ARCH="$(uname -m)"
_TITLE="Archboot ${_RUNNING_ARCH} | Arch Linux Setup | Clock Configuration"
# _dialog()
# an el-cheapo dialog wrapper
#
# parameters: see dialog(1)
# returns: whatever dialog did
_dialog() {
    dialog --backtitle "${_TITLE}" --aspect 15 "$@"
    return $?
}

_abort() {
    if _dialog --yesno "Abort Arch Linux Clock Configuration?" 5 45; then
        [[ -e /tmp/.clock-running ]] && rm /tmp/.clock-running
        [[ -e /tmp/.clock ]] && rm /tmp/.clock
        clear
        exit 1
    else
        _timezone
    fi
}

_hwclock() {
    _DATE_PROGRAM=timedatectl
    echo 0.0 0 0.0 > /etc/adjtime
    echo 0 >> /etc/adjtime
    [[ "${_HARDWARECLOCK}" = "UTC" ]] && echo UTC >> /etc/adjtime
    [[ "${_HARDWARECLOCK}" = "" ]] && echo LOCAL >> /etc/adjtime
    if [[ "${_HARDWARECLOCK}" = "UTC" ]]; then
        timedatectl set-local-rtc 0
    else
        timedatectl set-local-rtc 1
    fi
}

_timezone () {
    _REGIONS="America - Europe - Africa - Asia - Australia -"
    #shellcheck disable=SC2086
    if _dialog --title " Region Menu " --menu "" 11 30 6 ${_REGIONS} 2>${_ANSWER}; then
        _REGION=$(cat ${_ANSWER})
        _ZONES=""
    else
        _abort
    fi
    for i in $(timedatectl --no-pager list-timezones | grep -w "${_REGION}" | cut -d '/' -f 2 | sort -u); do
        _ZONES="${_ZONES} ${i} -"
    done
    #shellcheck disable=SC2086
    if _dialog --title " Timezone Menu " --menu "" 21 30 16 ${_ZONES} 2>${_ANSWER}; then
        _ZONE=$(cat ${_ANSWER})
        [[ "${_ZONE}" == "${_REGION}" ]] || _ZONE="${_REGION}/${_ZONE}"
        _dialog --infobox "Setting Timezone to ${_ZONE}..." 3 50
        timedatectl set-timezone "${_ZONE}"
        sleep 3
    else
        _timezone
    fi
}

_timeset() {
    _SET_TIME=""
    _HARDWARECLOCK=""
    _DATE_PROGRAM=""
    _dialog --yesno "Do you want to use UTC for your clock?\n\nIf you choose 'YES' UTC (recommended default) is used,\nwhich ensures daylightsaving is set automatically.\n\nIf you choose 'NO' Localtime is used, which means\nthe system will not change the time automatically.\nLocaltime is also prefered on dualboot machines,\nwhich also run Windows, because UTC may confuse it." 14 60 && _HARDWARECLOCK="UTC"
    _hwclock
    # check internet connection
    if ping -c1 www.google.com &>/dev/null; then
        if _dialog --yesno \
        "Do you want to use the Network Time Protocol (NTP) for syncing your clock, by using the internet clock pool?" 6 60; then
            _dialog --infobox "Syncing clock with NTP pool..." 3 45
            # sync immediatly with standard pool
            if ! systemctl restart systemd-timesyncd; then
                _dialog --msgbox "An error has occured, time was not changed!" 0 0
                _timeset
            fi
            # enable background syncing
            timedatectl set-ntp 1
            _SET_TIME=1
        fi
    fi
    if [[ -z "${_SET_TIME}" ]]; then
        timedatectl set-ntp 0
        # display and ask to set date/time
        if _dialog --title ' Date Setting' --calendar "Use <TAB> to navigate and arrow keys to change values." 0 0 0 0 0 2> ${_ANSWER}; then
            _DATE="$(cat ${_ANSWER})"
        else
            _timeset
        fi
        if _dialog --title ' Time Setting ' --timebox "Use <TAB> to navigate and up/down to change values." 0 0 2> ${_ANSWER}; then
            _TIME="$(cat ${_ANSWER})"
        else
            _timeset
        fi
        # save the time
        # DD/MM/YYYY hh:mm:ss -> YYYY-MM-DD hh:mm:ss
        _DATETIME="$(echo "${_DATE}" "${_TIME}" | sed 's#\(..\)/\(..\)/\(....\) \(..\):\(..\):\(..\)#\3-\2-\1 \4:\5:\6#g')"
        timedatectl set-time "${_DATETIME}"
    fi
    if _dialog --cr-wrap --title " Confirmation Dialog " --yesno "$(${_DATE_PROGRAM})" 0 0; then
        _dialog --infobox "Clock configuration completed successfully." 3 50
        sleep 3
    else
        _timezone
    fi
}

if [[ -e /tmp/.clock-running ]]; then
    echo "clock already runs on a different console!"
    echo "Please remove /tmp/.clock-running first to launch clock!"
    exit 1
fi
: >/tmp/.clock-running
_timezone
_timeset
[[ -e /tmp/.clock-running ]] && rm /tmp/.clock-running
clear
exit 0
# vim: set ts=4 sw=4 et: