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✏️ Editing: tzdata.postinst

#! /bin/sh
set -e

LC_ALL=C
LANG=C
unset TZ
umask 022

. /usr/share/debconf/confmodule
db_version 2.0

if [ "$1" = configure ]; then
    # If the user prefers to manage the time zone by itself, let him doing that.

if ! [ -e /etc/timezone ] && [ -z "$DEBCONF_RECONFIGURE" ] ; then
        db_stop
        echo
        echo "User defined time zone, leaving /etc/localtime unchanged."
    else
    
        # Get the values from debconf
        AREA=Etc
        ZONE=UTC
        db_get tzdata/Areas && AREA="$RET"
        db_get tzdata/Zones/$AREA && ZONE="$RET"
        if [ "$AREA" = Legacy ]; then
            TIMEZONE="$ZONE"
        else
            TIMEZONE="$AREA/$ZONE"
        fi
        db_stop
    
        # Update the time zone
        echo "$TIMEZONE" > /etc/timezone
	ln -nsf "/usr/share/zoneinfo/$TIMEZONE" /etc/localtime.dpkg-new && \
	    mv -f /etc/localtime.dpkg-new /etc/localtime
	which restorecon >/dev/null 2>&1 && restorecon /etc/localtime
    
        echo 
        echo "Current default time zone: '$TIMEZONE'"
    fi

# Show the new setting to the user
    TZBase=$(LC_ALL=C TZ=UTC0 date)
    UTdate=$(LC_ALL=C TZ=UTC0 date -d "$TZBase")
    TZdate=$(unset TZ ; LANG=C date -d "$TZBase")
    echo "Local time is now:      $TZdate."
    echo "Universal Time is now:  $UTdate."
    if [ -z "$DEBCONF_RECONFIGURE" ] ; then
        echo "Run 'dpkg-reconfigure tzdata' if you wish to change it."
    fi
    echo
fi

exit 0

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