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#! /bin/sh

ask() {
    local question default answer

    question=$1
    default=$2
    if [ -z "${PACKAGE_BUILDING}" -a -z "${BATCH}" ]; then
    read -p "${question} [${default}]? " answer
    fi
    if [ x${answer} = x ]; then
    answer=${default}
    fi
    echo ${answer}
}

yesno() {
    local dflt question answer

    question=$1
    dflt=$2
    while :; do
    answer=$(ask "${question}" "${dflt}")
    case "${answer}" in
    [Yy]*)      return 0;;
    [Nn]*)      return 1;;
    esac
    echo "Please answer yes or no."
    done
}

delete_account() {
    local u g home

    u=$1
    g=$2
    if pw group show ${g} > /dev/null 2>&1; then
    if yesno "Do you want me to remove group \"${g}\"" y; then
        pw group del -n ${g}
        echo "Done."
    else
        GID=`pw group show ${g} | awk -F: '{ print $3 }'`
    fi
    fi
    if pw user show ${u} > /dev/null 2>&1; then
    if yesno "Do you want me to remove user \"${u}\"" y; then
        eval home=~${u}
        pw user del -n ${u} -r
        echo "Done."
        if [ -d "${home}" ]; then
        echo "Please remember to remove the home directory \"${home}\""
        fi

        # pw user del may have removed the group, too.
        # Put it back if the admin asked us to retain it.
        if [ -n "$GID" ]; then
        pw group show ${g} > /dev/null 2>&1
        if [ $? -ne 0 ]; then
            pw group add ${g}
        fi
        fi
    fi
    fi
}

delete_crontab_entries() {
    local b e
    b=$1
    e=$2

    TMPFILE=`mktemp -t munin` || exit 1
    crontab -u munin -l | sed -e "/^$b\$/,/^$e\$/d" -e '/^[     ]*#/d' -e '/^$/d' > $TMPFILE
    if [ -s $TMPFILE ]; then
    crontab -u munin -l | sed -e "/^$b\$/,/^$e\$/d" | crontab -u munin -
    echo "The crontab for user munin had manually created entries."
    echo "Only the automatically created entries have been removed."
    echo "These are the remaining lines:"
    crontab -u munin -l
    else
    echo y | crontab -u munin -r
    echo "crontab for user munin removed"
    fi
    rm $TMPFILE
}

delnewsyslog() {
    tmp="/etc/#munin-node$$"
    sed -e '/^\/var\/log\/munin-main\/\*\.log[  ]/d' /etc/newsyslog.conf >${tmp}
    cat ${tmp} > /etc/newsyslog.conf
    rm ${tmp}
}

newsyslog() {
    ENTRY=`fgrep '/var/log/munin-main/*' /etc/newsyslog.conf`
    DEFAULT='/var/log/munin-main/*.log munin:munin  644  7     *    @T00  GNWZ'
    if [ -z "$ENTRY" ]; then
        exit 0
    elif [ "$ENTRY" = "$DEFAULT" ]; then
        delnewsyslog
    elif yesno "You have changed the default munin-main entry in \"/etc/newsyslog.conf\".
Do you want me to delete it?" y; then
        delnewsyslog
        echo "Done."
    fi
}


case $2 in
    DEINSTALL)
    if [ -z "${PACKAGE_BUILDING}" ]; then
        delete_crontab_entries '#BEGIN_MUNIN_MAIN' '#END_MUNIN_MAIN'
        newsyslog
    fi
    ;;
    POST-DEINSTALL)
    delete_account munin munin
    ;;
esac