From b8c2d340f3bde4b3c1a5a7e3635ac0109d4ecddd Mon Sep 17 00:00:00 2001
From: Daniel Dickinson <openwrt@daniel.thecshore.com>
Date: Wed, 2 Dec 2015 00:17:52 -0500
Subject: luci-mod-admin-full: fstab: Add ability to unmount non-system mounts

Add an unmount button for non-system mounts which will unmount
the corresponding file system.
---
 .../luasrc/model/cbi/admin_system/fstab.lua        | 40 +++++++++++++++++++++-
 1 file changed, 39 insertions(+), 1 deletion(-)

diff --git a/modules/luci-mod-admin-full/luasrc/model/cbi/admin_system/fstab.lua b/modules/luci-mod-admin-full/luasrc/model/cbi/admin_system/fstab.lua
index d4e834daf..4edc81193 100644
--- a/modules/luci-mod-admin-full/luasrc/model/cbi/admin_system/fstab.lua
+++ b/modules/luci-mod-admin-full/luasrc/model/cbi/admin_system/fstab.lua
@@ -37,8 +37,32 @@ block:close()
 m = Map("fstab", translate("Mount Points"))
 
 local mounts = luci.sys.mounts()
+local non_system_mounts = {}
+for rawmount, val in pairs(mounts) do
+      repeat 
+          val.umount = false
+          if (val.mountpoint == "/") then
+              break
+          elseif (val.mountpoint == "/overlay") then
+              break
+          elseif (val.mountpoint == "/rom") then
+              break
+          elseif (val.mountpoint == "/tmp") then
+              break
+          elseif (val.mountpoint == "/tmp/shm") then
+              break
+          elseif (val.mountpoint == "/tmp/upgrade") then
+              break
+          elseif (val.mountpoint == "/dev") then
+              break
+          end
+          val.umount = true
+      until true
+      non_system_mounts[rawmount] = val       
+   end   
+end
 
-v = m:section(Table, mounts, translate("Mounted file systems"))
+v = m:section(Table, non_system_mounts, translate("Mounted file systems"))
 
 fs = v:option(DummyValue, "fs", translate("Filesystem"))
 
@@ -61,7 +85,21 @@ function used.cfgvalue(self, section)
 	) .. ")"
 end
 
+unmount = v:option(Button, "unmount", translate("Unmount"))
+unmount.render = function(self, section, scope)
+	if non_system_mounts[section].umount then
+		self.title = translate("Unmount")
+		self.inputstyle = "remove"
+        	Button.render(self, section, scope)
+	end
+end
 
+unmount.write = function(self, section)
+	if non_system_mounts[section].umount then
+		luci.sys.call("/bin/umount '%s'" % luci.util.shellstartsqescape(non_system_mounts[section].mountpoint))
+		return luci.http.redirect(luci.dispatcher.build_url("admin/system", "fstab"))
+        end
+end
 
 mount = m:section(TypedSection, "mount", translate("Mount Points"), translate("Mount Points define at which point a memory device will be attached to the filesystem"))
 mount.anonymous = true
-- 
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