REDIR_PUSH
redirect(cmd->ncmd.redirect, REDIR_PUSH);
mode = (cmdentry.u.index == EXECCMD)? 0 : REDIR_PUSH;
redirect(n->nredir.redirect, REDIR_PUSH);
if (flags & REDIR_PUSH) {
if ((flags & REDIR_PUSH) && sv->renamed[fd] == EMPTY) {