unputc
ret = ttyrub(unputc(&tp->t_rawq), tp);
if (ttyrub(unputc(&tp->t_rawq), tp))
while ((c = unputc(&tp->t_rawq)) == ' ' || c == '\t')
c = unputc(&tp->t_rawq);
c = unputc(&tp->t_rawq);
(void) unputc(&tp->t_outq);
unputc(&tp->t_outq);
int unputc(struct clist *q);