Add node_modules

node_modules/ps-tree/index.js

@@ -0,0 +1,119 @@
+'use strict';
+
+var spawn = require('child_process').spawn,
+    es    = require('event-stream');
+
+module.exports = function childrenOfPid(pid, callback) {
+  var headers = null;
+
+  if (typeof callback !== 'function') {
+    throw new Error('childrenOfPid(pid, callback) expects callback');
+  }
+
+  if (typeof pid === 'number') {
+    pid = pid.toString();
+  }
+
+  //
+  // The `ps-tree` module behaves differently on *nix vs. Windows
+  // by spawning different programs and parsing their output.
+  //
+  // Linux:
+  // 1. " <defunct> " need to be striped
+  // ```bash
+  // $ ps -A -o comm,ppid,pid,stat
+  // COMMAND          PPID   PID STAT
+  // bbsd             2899 16958 Ss
+  // watch <defunct>  1914 16964 Z
+  // ps              20688 16965 R+
+  // ```
+  //
+  // Win32:
+  // 1. wmic PROCESS WHERE ParentProcessId=4604 GET Name,ParentProcessId,ProcessId,Status)
+  // 2. The order of head columns is fixed
+  // ```shell
+  // > wmic PROCESS GET Name,ProcessId,ParentProcessId,Status
+  // Name                          ParentProcessId  ProcessId   Status
+  // System Idle Process           0                0
+  // System                        0                4
+  // smss.exe                      4                228
+  // ```
+
+  var processLister;
+  if (process.platform === 'win32') {
+    // See also: https://github.com/nodejs/node-v0.x-archive/issues/2318
+    processLister = spawn('wmic.exe', ['PROCESS', 'GET', 'Name,ProcessId,ParentProcessId,Status']);
+  } else {
+    processLister = spawn('ps', ['-A', '-o', 'ppid,pid,stat,comm']);
+  }
+
+  es.connect(
+    // spawn('ps', ['-A', '-o', 'ppid,pid,stat,comm']).stdout,
+    processLister.stdout,
+    es.split(),
+    es.map(function (line, cb) { //this could parse alot of unix command output
+      var columns = line.trim().split(/\s+/);
+      if (!headers) {
+        headers = columns;
+
+        //
+        // Rename Win32 header name, to as same as the linux, for compatible.
+        //
+        headers = headers.map(normalizeHeader);
+        return cb();
+      }
+
+      var row = {};
+      // For each header
+      var h = headers.slice();
+      while (h.length) {
+        row[h.shift()] = h.length ? columns.shift() : columns.join(' ');
+      }
+
+      return cb(null, row);
+    }),
+    es.writeArray(function (err, ps) {
+      var parents = {},
+          children = [];
+
+      parents[pid] = true;
+      ps.forEach(function (proc) {
+        if (parents[proc.PPID]) {
+          parents[proc.PID] = true;
+          children.push(proc)
+        }
+      });
+
+      callback(null, children);
+    })
+  ).on('error', callback)
+}
+
+/**
+ * Normalizes the given header `str` from the Windows
+ * title to the *nix title.
+ *
+ * @param {string} str Header string to normalize
+ */
+function normalizeHeader(str) {
+  if (process.platform !== 'win32') {
+    return str;
+  }
+
+  switch (str) {
+    case 'Name':
+      return 'COMMAND';
+      break;
+    case 'ParentProcessId':
+      return 'PPID';
+      break;
+    case 'ProcessId':
+      return 'PID';
+      break;
+    case 'Status':
+      return 'STAT';
+      break;
+    default:
+      throw new Error('Unknown process listing header: ' + str);
+  }
+}