REC_D_F
while ((*(pos+1) != '\0') && !((FLD_D | REC_D_F) & l_d_mask[*++pos]));\
d_mask[REC_D = '\n'] = REC_D_F;
d_mask[REC_D] = REC_D_F;
if (d_mask[(u_char)*optarg] & REC_D_F)