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+# spawn-sync
+
+Polyfill for `child_process.spawnSync`.
+
+On iojs and node >= 0.12 it will just export the built in `child_process.spawnSync`. On platforms that support compiling native modules it uses the [thread-sleep](https://github.com/ForbesLindesay/thread-sleep) module to wait for an output file to exist in a tight loop.  In this way it gains excellent cross platform support, but don't expect it to be efficient on all platforms.
+
+[![Tests Status](https://img.shields.io/travis/ForbesLindesay/spawn-sync/master.svg)](https://travis-ci.org/ForbesLindesay/spawn-sync)
+[![Dependency Status](https://img.shields.io/david/ForbesLindesay/spawn-sync.svg)](https://david-dm.org/ForbesLindesay/spawn-sync)
+[![NPM version](https://img.shields.io/npm/v/spawn-sync.svg)](https://www.npmjs.com/package/spawn-sync)
+
+## Installation
+
+    npm install spawn-sync
+
+If this fails, you can try one of the following things:
+
+1. Some package managers made a stupid decision to rename the `node` executable to `nodejs` for their platform.  This breaks compatibility with lots of modules.  If you normally use `nodejs` instead of `node`, you should check out http://stackoverflow.com/questions/18130164/nodejs-vs-node-on-ubuntu-12-04 for possible fixes.
+
+2. You can install using `--unsafe-perm`, which will fix any permissions issues.
+
+    npm install --unsafe-perm spawn-sync
+
+3. You can install using `--ignore-scripts`, which will skip native compilation.  You'll get a warning if you try to require the module, but everything should still work.
+
+    npm install --ignore-scripts spawn-sync
+
+4. You can try [updating npm](https://docs.npmjs.com/getting-started/installing-node), since this seems to fail on some older versions of npm:
+
+    sudo npm install npm -g
+
+5. You can upgrade to the latest version of node or iojs.  This will make native compilation unnecessary.  You can then use `--ignore-scripts` without getting a warning if you still have trouble.
+
+## Usage
+
+```js
+var spawnSync = require('spawn-sync');
+
+var result = spawnSync('node',
+                       ['filename.js'],
+                       {input: 'write this to stdin'});
+
+if (result.status !== 0) {
+  process.stderr.write(result.stderr);
+  process.exit(result.status);
+} else {
+  process.stdout.write(result.stdout);
+  process.stderr.write(result.stderr);
+}
+```
+
+## License
+
+  MIT