1. Updated metadata for linux ipcSocket

2, Added linux-acpi, and attached events to power-monitor for linux

modules/linux-acpi.js

@@ -0,0 +1,47 @@
+/*
+Copyright 2020 Intel Corporation
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+
+function linux_acpi()
+{
+    this._ObjectID = 'linux-acpi';
+    require('events').EventEmitter.call(this, true)
+        .createEvent('acpi');
+    Object.defineProperty(this, "supported", { value: require('fs').existsSync('/var/run/acpid.socket') });
+    if(this.supported)
+    {
+        this._client = require('net').createConnection({ path: '/var/run/acpid.socket', metadata: 'linux-acpi' }, function ()
+        {
+            this.on('data', function (chunk)
+            {
+                var blocks;
+                var ubuffer = null;
+                var tokens = chunk.toString().split('\n');
+                if (tokens.length == 1) { this.unshift(chunk); }
+                if (tokens.peek() != '') { ubuffer = Buffer.from(tokens.pop()); }
+                else { tokens.pop(); }
+                for (var i in tokens)
+                {
+                    blocks = tokens[i].split(' ');
+                    this.ret.emit('acpi', { name: blocks[0], type: Buffer.from(blocks[2], 'hex').readUInt32BE(), value: Buffer.from(blocks[3], 'hex').readUInt32BE() });
+                }
+            });
+        });
+        this._client.ret = this;
+    }
+}
+
+module.exports = new linux_acpi();