Merge pull request #18 from aliyun-node/get_process_env

add get_process_env command

Author: JacksonTian

.eslintignore

@@ -0,0 +1,3 @@
+*.debug.js
+*.min.js
+node_modules/*

.eslintrc

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+{
+  "rules": {
+    "indent": [
+      2,
+      2
+    ],
+    "quotes": [
+      2,
+      "single"
+    ],
+    "linebreak-style": [
+      2,
+      "unix"
+    ],
+    "semi": [2, "always"],
+    "strict": [2, "global"],
+    "curly": 2,
+    "eqeqeq": 2,
+    "no-eval": 2,
+    "guard-for-in": 2,
+    "no-caller": 2,
+    "no-else-return": 2,
+    "no-eq-null": 2,
+    "no-extend-native": 2,
+    "no-extra-bind": 2,
+    "no-floating-decimal": 2,
+    "no-implied-eval": 2,
+    "no-labels": 2,
+    "no-with": 2,
+    "no-loop-func": 1,
+    "no-native-reassign": 2,
+    "no-redeclare": [2, {"builtinGlobals": true}],
+    "no-delete-var": 2,
+    "no-shadow-restricted-names": 2,
+    "no-undef-init": 2,
+    "no-use-before-define": 2,
+    "no-unused-vars": [2, {"args": "none"}],
+    "no-undef": 2,
+    "callback-return": [2, ["callback", "cb", "next"]],
+    "global-require": 0,
+    "no-console": 0,
+    "require-yield": 0
+  },
+  "env": {
+    "es6": true,
+    "node": true,
+    "browser": true
+  },
+  "globals": {
+    "describe": true,
+    "it": true,
+    "before": true,
+    "after": true
+  },
+  "parserOptions": {
+    "ecmaVersion": 8,
+    "sourceType": "script",
+    "ecmaFeatures": {
+      "jsx": true
+    }
+  },
+  "extends": "eslint:recommended"
+}

get_process_env

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+#!/bin/sh
+
+export ENABLE_NODE_LOG=NO
+
+DIR=$(cd "$(dirname "$0")"; pwd)
+GET_NODE_EXE=$DIR/get_node_exe
+NODE_EXE=`$GET_NODE_EXE`
+
+SCRIPT=$DIR/get_process_env.js
+
+#get_process_env pid
+$NODE_EXE "$SCRIPT" $1

get_process_env.js

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+'use strict';
+
+const { execSync } = require('child_process');
+
+const argv = process.argv.slice(2);
+
+const [pid] = argv;
+
+if (!pid) {
+  console.log('Please pass <pid>');
+  console.log('Usage:');
+  console.log('  get_process_env <pid>');
+  process.exit(1);
+}
+
+if (require('os').type() !== 'Linux') {
+  console.log('Not support non-linux');
+  process.exit(1);
+}
+
+function getAlinodeVersion(pid) {
+  const output = execSync(`ls -l /proc/${pid}/exe`, {
+    encoding: 'utf8'
+  });
+  // get execPath from PID
+  // $ ls -l /proc/10532/exe
+  // lrwxrwxrwx 1 puling.tyq users 0 Mar  8 16:54 /proc/10532/exe -> /home/puling.tyq/.tnvm/versions/node/v8.6.0/bin/node
+  let [, execPath] = output.split('->');
+  execPath = execPath.trim();
+  if (!execPath.endsWith('bin/node')) {
+    return '';
+  }
+
+  const versionOutput = execSync(`${execPath} -p "process.alinode"`, {
+    encoding: 'utf8'
+  });
+
+  return versionOutput.trim();
+}
+
+function getProcessEnv(pid) {
+  const output = execSync(`cat /proc/${pid}/environ`, {
+    encoding: 'utf8'
+  });
+  const lines = output.split('\u0000');
+
+  var env = {ENABLE_NODE_LOG: '', NODE_LOG_DIR: '/tmp'};
+
+  for (var i = 0; i < lines.length; i++) {
+    const line = lines[i];
+    if (line.startsWith('ENABLE_NODE_LOG')) {
+      env.ENABLE_NODE_LOG = line.split('=')[1];
+    }
+
+    if (line.startsWith('NODE_LOG_DIR')) {
+      env.NODE_LOG_DIR = line.split('=')[1];
+    }
+  }
+
+  if (!env.NODE_LOG_DIR.endsWith('/')) {
+    env.NODE_LOG_DIR += '/';
+  }
+
+  return env;
+}
+
+var env = getProcessEnv(pid);
+
+const logdir = process.env.logdir;
+
+var data = {
+  alinode_version: getAlinodeVersion(pid),
+  ENABLE_NODE_LOG: env.ENABLE_NODE_LOG,
+  NODE_LOG_DIR: env.NODE_LOG_DIR,
+  logdir: logdir
+};
+
+console.log(JSON.stringify(data));