From a6d11796da0f3a323b99e9b2ac65e42e431ba1a3 Mon Sep 17 00:00:00 2001
From: Awal Garg <awalgarg@gmail.com>
Date: Mon, 19 Mar 2018 02:00:41 +0530
Subject: [PATCH] Add dns_maradns.sh

MaraDNS is a lightweight self-hosting DNS server. This patch adds
support for adding records to zone files stored on the server in the
format expected by MaraDNS. Path to the file should be exported in
MARA_ZONE_FILE environment variable. To reload the configuration
automatically, the user must provide pid of duende (the daemonization
tool that ships with MaraDNS) in MARA_DUENDE_PID or path to the pid file
(--pid argument to duende) in MARA_DUENDE_PID_PATH.
---
 dnsapi/dns_maradns.sh | 37 +++++++++++++++++++++++++++++++++++++
 1 file changed, 37 insertions(+)
 create mode 100755 dnsapi/dns_maradns.sh

diff --git a/dnsapi/dns_maradns.sh b/dnsapi/dns_maradns.sh
new file mode 100755
index 00000000..17665dba
--- /dev/null
+++ b/dnsapi/dns_maradns.sh
@@ -0,0 +1,37 @@
+#!/usr/bin/env sh
+
+dns_maradns_add() {
+	_checkZoneFile || return 1
+	fulldomain="$1"
+	txtvalue="$2"
+	printf "%s. TXT '%s' ~\n" "$fulldomain" "$txtvalue" | tee -a "$MARA_ZONE_FILE" || return 1
+	_try_reload_maradns
+}
+
+dns_maradns_rm() {
+	_checkZoneFile || return 1
+	fulldomain="$1"
+	txtvalue="$2"
+	sed -i "/^$fulldomain.\+TXT '$txtvalue' ~/d" "$MARA_ZONE_FILE"
+	_try_reload_maradns
+}
+
+_checkZoneFile() {
+	if [ -w "$MARA_ZONE_FILE" ]; then
+		return 0
+	fi
+	_err "MARA_ZONE_FILE not set or not writable"
+	return 1
+}
+
+_try_reload_maradns() {
+	if [ -n "$MARA_DUENDE_PID" ]; then
+		kill -s HUP -- "$MARA_DUENDE_PID"
+		return $?
+	fi
+	if [ -r "$MARA_DUENDE_PID_PATH" ]; then
+		kill -s HUP -- "$(cat $MARA_DUENDE_PID_PATH)"
+		return $?
+	fi
+	_info "Reload MaraDNS manually (or provide MARA_DUENDE_PID or MARA_DUENDE_PID_PATH)"
+}