Add shutdown app

luci-app-shutdown/Makefile

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+#
+# Copyright (C) 2020 Ycarus (Yannick Chabanois) <ycarus@zugaina.org>
+#
+#
+
+include $(TOPDIR)/rules.mk
+
+LUCI_TITLE:=LuCI Shutdown device app
+
+PKG_LICENSE:=GPLv3
+
+include $(TOPDIR)/feeds/luci/luci.mk
+
+# call BuildPackage - OpenWrt buildroot signature

luci-app-shutdown/htdocs/luci-static/resources/view/system/shutdown.js

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+'use strict';
+'require fs';
+'require uci';
+'require ui';
+
+return L.view.extend({
+	render: function(changes) {
+		var body = E([
+		    E('h2', _('Shutdown')),
+		    E('p', {}, _('Shutdown the operating system of your device'))
+		]);
+
+		for (var config in (changes || {})) {
+			body.appendChild(E('p', { 'class': 'alert-message warning' },
+			_('Warning: There are unsaved changes that will get lost on shutdown!')));
+			break;
+		}
+
+		body.appendChild(E('hr'));
+		body.appendChild(E('button', {
+		    'class': 'cbi-button cbi-button-action important',
+		    'click': ui.createHandlerFn(this, 'handleShutdown')
+		}, _('Perform shutdown')));
+
+	return body;
+	},
+
+	handleShutdown: function(ev) {
+		return fs.exec('/sbin/poweroff').then(function(res) {
+			if (res.code != 0) {
+				L.ui.addNotification(null, E('p', _('The poweroff command failed with code %d').format(res.code)));
+				L.raise('Error', 'Poweroff failed');
+			}
+		})
+		.catch(function(e) { L.ui.addNotification(null, E('p', e.message)) });
+	},
+
+	handleSaveApply: null,
+	handleSave: null,
+	handleReset: null
+});

luci-app-shutdown/root/usr/share/luci/menu.d/luci-app-shutdown.json

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+{
+	"admin/system/shutdown": {
+		"title": "Shutdown",
+		"order": 60,
+		"action": {
+			"type": "view",
+			"path": "system/shutdown"
+		}
+	}
+}

luci-app-shutdown/root/usr/share/rpcd/acl.d/luci-app-shutdown.json

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+{
+    "luci-app-shutdown": {
+	"description": "Allow shutdown the device",
+	"read": {
+	    "file": {
+		"/sbin/poweroff": [ "exec" ]
+	    },
+	    "ubus": {
+		"file": [ "exec" ]
+	    }
+	}
+    }
+}