From 58d35b94e3d407e14b7c7ae391ed6fd8ff26dc0e Mon Sep 17 00:00:00 2001
From: Ycarus <ycarus@zugaina.org>
Date: Tue, 11 Jun 2019 19:27:45 +0200
Subject: [PATCH] Detect if root FS is readonly

---
 .../luasrc/controller/openmptcprouter.lua         | 15 +++++++++++++++
 .../luasrc/view/openmptcprouter/wanstatus.htm     |  4 ++++
 2 files changed, 19 insertions(+)

diff --git a/luci-app-openmptcprouter/luasrc/controller/openmptcprouter.lua b/luci-app-openmptcprouter/luasrc/controller/openmptcprouter.lua
index 37cee5cc2..7ff39802a 100644
--- a/luci-app-openmptcprouter/luasrc/controller/openmptcprouter.lua
+++ b/luci-app-openmptcprouter/luasrc/controller/openmptcprouter.lua
@@ -914,6 +914,21 @@ function interfaces_status()
 	mArray.openmptcprouter["loadavg"] = sys.exec("cat /proc/loadavg 2>/dev/null"):match("[%d%.]+ [%d%.]+ [%d%.]+")
 	mArray.openmptcprouter["uptime"] = sys.exec("cat /proc/uptime 2>/dev/null"):match("[%d%.]+")
 
+	mArray.openmptcprouter["fstype"] = sys.exec("cat /proc/mounts | awk '/\/dev\/root/ {print $3}' | tr -d '\n'")
+	if mArray.openmptcprouter["fstype"] == "ext4" then
+		if sys.exec("cat /proc/mounts | awk '/\/dev\/root/ {print $4}' | grep ro") == "" then
+			mArray.openmptcprouter["fsro"] = false
+		else
+			mArray.openmptcprouter["fsro"] = true
+		end
+	elseif mArray.openmptcprouter["fstype"] == "squashfs" then
+		if sys.exec("cat /proc/mounts | awk '/overlayfs/ {print $4}' | grep overlay") == "" then
+			mArray.openmptcprouter["fsro"] = true
+		else
+			mArray.openmptcprouter["fsro"] = false
+		end
+	end
+
 	-- overview status
 	mArray.wans = {}
 	mArray.tunnels = {}
diff --git a/luci-app-openmptcprouter/luasrc/view/openmptcprouter/wanstatus.htm b/luci-app-openmptcprouter/luasrc/view/openmptcprouter/wanstatus.htm
index 1b80d9941..a0e7fb5f7 100644
--- a/luci-app-openmptcprouter/luasrc/view/openmptcprouter/wanstatus.htm
+++ b/luci-app-openmptcprouter/luasrc/view/openmptcprouter/wanstatus.htm
@@ -140,6 +140,10 @@
 						statusMessage += '<br/>';
 					}
 				}
+				if (mArray.openmptcprouter.fsro == true)
+				{
+					statusMessage += 'Filesystem is readonly<br/>';
+				}
 				if (mArray.openmptcprouter.tun_service == false)
 				{
 					statusMessage += 'GloryTUN is not running<br/>';