sys.exec() no longer uses Promise

1 files changed, 5 insertions, 6 deletions

diff --git a/lib/sys.js b/lib/sys.js
index 65badcdc05..cbdf0c5788 100644
--- a/lib/sys.js
+++ b/lib/sys.js
@@ -138,11 +138,10 @@ exports.p = function () {
   }
 };
 
-exports.exec = function (command) {
+exports.exec = function (command, callback) {
   var child = process.createChildProcess("/bin/sh", ["-c", command]);
   var stdout = "";
   var stderr = "";
-  var promise = new events.Promise();
 
   child.addListener("output", function (chunk) {
     if (chunk) stdout += chunk;
@@ -154,13 +153,13 @@ exports.exec = function (command) {
 
   child.addListener("exit", function (code) {
     if (code == 0) {
-      promise.emitSuccess(stdout, stderr);
+      if (callback) callback(null, stdout, stderr);
     } else {
-      promise.emitError(code, stdout, stderr);
+      var e = new Error("Command failed: " + stderr);
+      e.code = code;
+      if (callback) callback(e, stdout, stderr);
     }
   });
-
-  return promise;
 };
 
 /**