From 843acddbe167ff9d47a71b27eb4264c0d88b6cae Mon Sep 17 00:00:00 2001
From: akr <akr@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Fri, 23 Oct 2009 15:38:06 +0000
Subject: * io.c (io_cntl): update max file descriptor by the result of  
 fcntl(F_DUPFD).

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@25446 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 io.c | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'io.c')

diff --git a/io.c b/io.c
index 7ef11920ed..426cba5a55 100644
--- a/io.c
+++ b/io.c
@@ -7237,6 +7237,9 @@ io_cntl(int fd, unsigned long cmd, long narg, int io_p)
 # else
     retval = io_p?ioctl(fd, cmd, narg):fcntl(fd, (int)cmd, narg);
 # endif
+    if (!io_p && retval != -1 && cmd == F_DUPFD) {
+        UPDATE_MAXFD(retval);
+    }
 #else
     if (!io_p) {
 	rb_notimplement();
-- 
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