* io.c (pipe_open): avoid closing uninitialized file descriptors.

  a patch from <tommy at tmtm.org> [ruby-dev:28600]


git-svn-id: http://svn.ruby-lang.org/repos/ruby/branches/ruby_1_8@10395 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 13 insertions, 2 deletions

diff --git a/io.c b/io.c
index 8fc095758..1b9cff03c 100644
--- a/io.c
+++ b/io.c
@@ -3136,8 +3136,19 @@ retry:
 	    rb_thread_sleep(1);
 	    goto retry;
 	}
-	close(pr[0]); close(pw[1]);
-	rb_sys_fail(pname);
+	else {
+	    int e = errno;
+	    if ((modef & FMODE_READABLE)) {
+		close(pr[0]);
+		close(pr[1]);
+	    }
+	    if ((modef & FMODE_WRITABLE)) {
+		close(pw[0]);
+		close(pw[1]);
+	    }
+	    errno = e;
+	    rb_sys_fail(pname);
+	}
 	break;
 
       default:			/* parent */