* io.c (rb_cloexec_dup2): don't set CLOEXEC for standard file

  descriptors.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@33563 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 1 insertions, 1 deletions

diff --git a/io.c b/io.c
index 5bec3622f4..1e04a1d6f5 100644
--- a/io.c
+++ b/io.c
@@ -234,7 +234,7 @@ rb_cloexec_dup2(int oldfd, int newfd)
 
 #if defined(HAVE_DUP3) && defined(O_CLOEXEC)
     static int try_dup3 = 1;
-    if (try_dup3) {
+    if (2 < newfd && try_dup3) {
         ret = dup3(oldfd, newfd, O_CLOEXEC);
         /* dup3 is available since Linux 2.6.27. */
         if (ret == -1 && errno == ENOSYS) {