1 files changed, 8 insertions, 0 deletions

diff --git a/src/process.c b/src/process.c
index a7ef9c36589..5bab9684a7a 100644
--- a/src/process.c
+++ b/src/process.c
@@ -1794,6 +1794,12 @@ create_process (process, new_argv, current_dir)
 #endif
       if (forkin < 0)
         report_file_error ("Opening pty", Qnil);
+#if defined (RTU) || defined (UNIPLUS) || defined (DONT_REOPEN_PTY)
+      /* In the case that vfork is defined as fork, the parent process
+         (Emacs) may send some data before the child process completes
+         tty options setup.  So we setup tty before forking.  */
+      child_setup_tty (forkout);
+#endif /* RTU or UNIPLUS or DONT_REOPEN_PTY */
 #else
       forkin = forkout = -1;
 #endif /* not USG, or USG_SUBTTY_WORKS */
@@ -2078,8 +2084,10 @@ create_process (process, new_argv, current_dir)
 #endif /* SIGCHLD */
 #endif /* !POSIX_SIGNALS */
 
+#if !defined (RTU) && !defined (UNIPLUS) && !defined (DONT_REOPEN_PTY)
         if (pty_flag)
           child_setup_tty (xforkout);
+#endif /* not RTU and not UNIPLUS and not DONT_REOPEN_PTY */
 #ifdef WINDOWSNT
         pid = child_setup (xforkin, xforkout, xforkout,
                            new_argv, 1, current_dir);