child_process, win: fix shell spawn with AutoRun

Under Windows system can be configured to execute a specific command
each time a shell is spawned. Under some conditions this breaks the
way node handles shell scripts under windows.
This commit adds /d switch to spawn and spawnSync which disables this
AutoRun functionality.

Fixes: nodejs/node-v0.x-archive#25458
PR-URL: #8063
Reviewed-By: João Reis <reis@janeasystems.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Josh Gavant <josh.gavant@outlook.com>
Reviewed-By: Rod Vagg <rod@vagg.org>

doc/api/child_process.md

@@ -132,7 +132,7 @@ added: v0.1.90
   * `encoding` {String} (Default: `'utf8'`)
   * `shell` {String} Shell to execute the command with
     (Default: `'/bin/sh'` on UNIX, `'cmd.exe'` on Windows, The shell should
-     understand the `-c` switch on UNIX or `/s /c` on Windows. On Windows,
+     understand the `-c` switch on UNIX or `/d /s /c` on Windows. On Windows,
      command line parsing should be compatible with `cmd.exe`.)
   * `timeout` {Number} (Default: `0`)
   * [`maxBuffer`][] {Number} largest amount of data (in bytes) allowed on
@@ -317,7 +317,7 @@ added: v0.1.90
   * `shell` {Boolean|String} If `true`, runs `command` inside of a shell. Uses
     `'/bin/sh'` on UNIX, and `'cmd.exe'` on Windows. A different shell can be
     specified as a string. The shell should understand the `-c` switch on UNIX,
-    or `/s /c` on Windows. Defaults to `false` (no shell).
+    or `/d /s /c` on Windows. Defaults to `false` (no shell).
 * return: {ChildProcess}
 
 The `child_process.spawn()` method spawns a new process using the given
@@ -619,7 +619,7 @@ added: v0.11.12
   * `env` {Object} Environment key-value pairs
   * `shell` {String} Shell to execute the command with
     (Default: `'/bin/sh'` on UNIX, `'cmd.exe'` on Windows, The shell should
-     understand the `-c` switch on UNIX or `/s /c` on Windows. On Windows,
+     understand the `-c` switch on UNIX or `/d /s /c` on Windows. On Windows,
      command line parsing should be compatible with `cmd.exe`.)
   * `uid` {Number} Sets the user identity of the process. (See setuid(2).)
   * `gid` {Number} Sets the group identity of the process. (See setgid(2).)
@@ -672,7 +672,7 @@ added: v0.11.12
   * `shell` {Boolean|String} If `true`, runs `command` inside of a shell. Uses
     `'/bin/sh'` on UNIX, and `'cmd.exe'` on Windows. A different shell can be
     specified as a string. The shell should understand the `-c` switch on UNIX,
-    or `/s /c` on Windows. Defaults to `false` (no shell).
+    or `/d /s /c` on Windows. Defaults to `false` (no shell).
 * return: {Object}
   * `pid` {Number} Pid of the child process
   * `output` {Array} Array of results from stdio output

lib/child_process.js

@@ -338,7 +338,7 @@ function normalizeSpawnArguments(file /*, args, options*/) {
     if (process.platform === 'win32') {
       file = typeof options.shell === 'string' ? options.shell :
               process.env.comspec || 'cmd.exe';
-      args = ['/s', '/c', '"' + command + '"'];
+      args = ['/d', '/s', '/c', '"' + command + '"'];
       options.windowsVerbatimArguments = true;
     } else {
       if (typeof options.shell === 'string')

test/common.js

@@ -241,7 +241,7 @@ exports.spawnPwd = function(options) {
   var spawn = require('child_process').spawn;
 
   if (exports.isWindows) {
-    return spawn('cmd.exe', ['/c', 'cd'], options);
+    return spawn('cmd.exe', ['/d', '/c', 'cd'], options);
   } else {
     return spawn('pwd', [], options);
   }
@@ -252,7 +252,7 @@ exports.spawnSyncPwd = function(options) {
   const spawnSync = require('child_process').spawnSync;
 
   if (exports.isWindows) {
-    return spawnSync('cmd.exe', ['/c', 'cd'], options);
+    return spawnSync('cmd.exe', ['/d', '/c', 'cd'], options);
   } else {
     return spawnSync('pwd', [], options);
   }