1 files changed, 49 insertions, 0 deletions
diff --git a/node_modules/pidtree/lib/bin.js b/node_modules/pidtree/lib/bin.js
new file mode 100644
index 0000000..1e917cc
--- /dev/null
+++ b/node_modules/pidtree/lib/bin.js
@@ -0,0 +1,49 @@
+'use strict';
+
+var spawn = require('child_process').spawn;
+
+/**
+ * Spawn a binary and read its stdout.
+ * @param  {String} cmd The name of the binary to spawn.
+ * @param  {String[]} args The arguments for the binary.
+ * @param  {Object} [options] Optional option for the spawn function.
+ * @param  {Function} done(err, stdout)
+ */
+function run(cmd, args, options, done) {
+  if (typeof options === 'function') {
+    done = options;
+    options = undefined;
+  }
+
+  var executed = false;
+  var ch = spawn(cmd, args, options);
+  var stdout = '';
+  var stderr = '';
+
+  ch.stdout.on('data', function(d) {
+    stdout += d.toString();
+  });
+
+  ch.stderr.on('data', function(d) {
+    stderr += d.toString();
+  });
+
+  ch.on('error', function(err) {
+    if (executed) return;
+    executed = true;
+    done(new Error(err));
+  });
+
+  ch.on('close', function(code) {
+    if (executed) return;
+    executed = true;
+
+    if (stderr) {
+      return done(new Error(stderr));
+    }
+
+    done(null, stdout, code);
+  });
+}
+
+module.exports = run;