saved_redirected_fd
STATIC int * saved_redirected_fd(int);
saved_redirected_fd(fd) != NULL)
if ((renamed = saved_redirected_fd(fd)) != NULL) {
saved_redirected_fd(redir->ndup.dupfd) != NULL)
if (!all && (sh_fd(fd) != NULL || saved_redirected_fd(fd) != NULL)) {