child_process: emit error on exec failure

libuv calls the exit cb with exit code == -1 when it fails to spawn the new
process. Anticipate that and emit the error on the ChildProcess object.

1 files changed, 5 insertions, 0 deletions

diff --git a/src/process_wrap.cc b/src/process_wrap.cc
index b156692ac..60f422d35 100644
--- a/src/process_wrap.cc
+++ b/src/process_wrap.cc
@@ -294,9 +294,14 @@ class ProcessWrap : public HandleWrap {
       String::New(signo_string(term_signal))
     };
 
+    if (exit_status == -1) {
+      SetErrno(uv_last_error(uv_default_loop()));
+    }
+
     if (onexit_sym.IsEmpty()) {
       onexit_sym = NODE_PSYMBOL("onexit");
     }
+
     MakeCallback(wrap->object_, onexit_sym, ARRAY_SIZE(argv), argv);
   }