* ext/pty/pty.c (pty_open): set FMODE_SYNC and FMODE_DUPLEX.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@20763 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 2 insertions, 2 deletions

diff --git a/ext/pty/pty.c b/ext/pty/pty.c
index 76da867a48..d190aba94f 100644
--- a/ext/pty/pty.c
+++ b/ext/pty/pty.c
@@ -412,13 +412,13 @@ pty_open(VALUE klass)
 
     master_io = rb_obj_alloc(rb_cIO);
     MakeOpenFile(master_io, master_fptr);
-    master_fptr->mode = rb_io_mode_flags("r+");
+    master_fptr->mode = FMODE_READWRITE | FMODE_SYNC | FMODE_DUPLEX;
     master_fptr->fd = master_fd;
     master_fptr->pathv = rb_obj_freeze(rb_sprintf(" pty %s", slavename));
 
     slave_file = rb_obj_alloc(rb_cFile);
     MakeOpenFile(slave_file, slave_fptr);
-    slave_fptr->mode = rb_io_mode_flags("r+");
+    slave_fptr->mode = FMODE_READWRITE | FMODE_SYNC | FMODE_DUPLEX | FMODE_TTY;
     slave_fptr->fd = slave_fd;
     slave_fptr->pathv = rb_obj_freeze(rb_str_new_cstr(slavename));