#! /bin/sh
# vim:ts=4:et

set -e

S_VERSION="10.3.1-1~"
PACKAGE="sysstat"
DEFAULT="/etc/default/$PACKAGE"
ENABLED="false"

### manage_default_file: manages $DEFAULT file with ucf ###
manage_default_file() {
    ENABLED="$1"

    if [ "$ENABLED" != "true" ] && [ "$ENABLED" != "false" ] ; then
        echo "Internal error in the sysstat's postinst: \$ENABLED=$ENABLED" 1>&2;
        exit 1;
    fi

    # Generate temporary files
    def_file=`tempfile -p sstat -s .def`

    # Fill new temporary default file
    cat > "$def_file" << EOF
#
# Default settings for /etc/init.d/sysstat, /etc/cron.d/sysstat
# and /etc/cron.daily/sysstat files
#

# Should sadc collect system activity informations? Valid values
# are "true" and "false". Please do not put other values, they
# will be overwritten by debconf!
ENABLED="$ENABLED"

EOF

    # Finally, run ucf
    ucf --three-way \
        --debconf-ok \
        "$def_file" "$DEFAULT"
    ucfr "$PACKAGE" "$DEFAULT"

    [ -e "$DEFAULT" ] && chmod 644 "$DEFAULT"
    rm -f "$def_file"
}

### Main ###

. /usr/share/debconf/confmodule

if [ "$1" = "configure" ] ; then
    if dpkg --compare-versions "$2" lt-nl "$S_VERSION"; then
        RET=""
        db_get sysstat/remove_files || true

        if [ "$RET" = "true" ]; then
            echo "Removing old statistics from /var/log/sysstat." 1>&2
            find  /var/log/sysstat -maxdepth 2 \( -name 'sa[0-9][0-9]' -o -name 'sa[0-9][0-9].gz' \
                                                  -o -name 'sa[0-9][0-9].bz2' \) -exec rm -f {} \;
        fi
    fi

    # show the question next time
    db_reset sysstat/remove_files || true

    db_get sysstat/enable || true
    ENABLED="$RET"

    manage_default_file "$ENABLED"

    # must be called *after* manage_default_file, which uses ucf --debconf-ok
    db_stop || true


    if ! update-alternatives --display sar 2>/dev/null | grep -q '^/usr/bin/sar\.sysstat'; then
        update-alternatives --install /usr/bin/sar sar /usr/bin/sar.sysstat 0 \
                            --slave /usr/share/man/man1/sar.1.gz sar.1.gz \
                            /usr/share/man/man1/sar.sysstat.1.gz
    fi


    # execute sa1 in a subshell not to clobber the postinst script with potentially
    # unsafe values from "$DEFAULT"
    if [ "$ENABLED" = "true" ] && [ -x /usr/lib/sysstat/sa1 ] ; then
        ( set +e ; /usr/lib/sysstat/sa1 1 1 )&
    fi
fi

# Automatically added by dh_installinit
if [ -x "/etc/init.d/sysstat" ]; then
	update-rc.d sysstat defaults >/dev/null || exit $?
fi
# End automatically added section


exit 0