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#!/bin/sh
# ubus monitor to trace dns backend events and conditionally restart adblock
# written by Dirk Brenken (dev@brenken.org)
# This is free software, licensed under the GNU General Public License v3.
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
LC_ALL=C
PATH="/usr/sbin:/usr/bin:/sbin:/bin"
if [ -r "/lib/functions.sh" ]
then
. "/lib/functions.sh"
adb_dns="$(uci_get adblock global adb_dns)"
fi
adb_ver="${1}"
adb_ubus="$(command -v ubus)"
adb_logger="$(command -v logger)"
f_log()
{
local class="${1}" log_msg="${2}"
if [ -x "${adb_logger}" ]
then
"${adb_logger}" -p "${class}" -t "adblock-${adb_ver}[${$}]" "${log_msg}"
else
printf "%s %s %s\\n" "${class}" "adblock-${adb_ver}[${$}]" "${log_msg}"
fi
}
if [ -x "${adb_ubus}" ] && [ -n "${adb_dns}" ]
then
f_log "info" "ubus/adblock service started"
"${adb_ubus}" -S -M r -m invoke monitor | \
{ grep -qE "\"method\":\"(set|signal)\",\"data\":\{\"name\":\"${adb_dns}\""; [ $? -eq 0 ] && /etc/init.d/adblock start; }
else
f_log "err" "can't start ubus/adblock service"
fi