duptoeol
cmd->t = duptoeol(p, "w command", NULL);
cmd->t = duptoeol(p, "read command", NULL);
cmd->t = duptoeol(p, "branch", &p);
cmd->t = duptoeol(p, "label", &p);
s->wfile = duptoeol(p, "s command w flag", NULL);
static char *duptoeol(char *, char *, char **);