if (redir)
{
/* Open response file. */
redir_handle = open (redir, O_WRONLY | O_TRUNC | O_CREAT);
redir_handle = open (redir, O_WRONLY | O_TRUNC | O_CREAT, S_IRUSR | S_IWUSR);
/* Duplicate the stdout and stderr file handles
so they can be restored later. */