* io.c (rb_pipe): pipe on cygwin can succeed half but fail

  half.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@32771 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 8 insertions, 0 deletions

diff --git a/io.c b/io.c
index 5e52ea6265..6be4e88744 100644
--- a/io.c
+++ b/io.c
@@ -4914,6 +4914,14 @@ rb_pipe(int *pipes)
             ret = pipe(pipes);
         }
     }
+#ifdef __CYGWIN__
+    if (ret == 0 && pipes[1] == -1) {
+	close(pipes[0]);
+	pipes[0] = -1;
+	errno = ENFILE;
+	return -1;
+    }
+#endif
     if (ret == 0) {
         rb_update_max_fd(pipes[0]);
         rb_update_max_fd(pipes[1]);