From 09cdc923c2e70d83891b27906a5ec517875879ce Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Sa=C3=BAl=20Ibarra=20Corretg=C3=A9?= <saghul@gmail.com>
Date: Fri, 10 Apr 2015 12:26:49 +0200
Subject: [PATCH] unix: fix potential bug if dup2 fails in uv_spawn

PR-URL: https://github.com/libuv/libuv/pull/309
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
---
 src/unix/process.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/unix/process.c b/src/unix/process.c
index 4990bbcf..f2a83753 100644
--- a/src/unix/process.c
+++ b/src/unix/process.c
@@ -319,7 +319,12 @@ static void uv__process_child_init(const uv_process_options_t* options,
     if (fd == use_fd)
       uv__cloexec(use_fd, 0);
     else
-      dup2(use_fd, fd);
+      fd = dup2(use_fd, fd);
+
+    if (fd == -1) {
+      uv__write_int(error_fd, -errno);
+      _exit(127);
+    }
 
     if (fd <= 2)
       uv__nonblock(fd, 0);