必需先做post.c的 hdr_outs_bar();

: mbox_item_bar() 放在 mbox_item() 後面

#ifdef HAVE_LIGHTBAR
static int
mbox_item_bar(xo, mode)
  XO *xo;                       /* sequence number */
  int mode;
{
  HDR *hdr;
#ifdef OVERDUE_MAILDEL
  int xmode;
#endif

  hdr = (HDR *) xo_pool + xo->pos - xo->top;

#ifdef OVERDUE_MAILDEL
  xmode = hdr->xmode;
  prints(xmode & MAIL_DELETE ?
    (mode ? "\033[1;44m%6d \033[5;37;41m%c\033[0;1;44m " :
      "%6d \033[1;5;37;41m%c\033[m ") :
    (mode ? "\033[1;44m%6d %c " :
      "%6d %c "),
    xo->pos + 1, mbox_attr(xmode));
#else
  prints("%s%6d %c ",
    mode ? "\033[1;44m" : "", xo->pos + 1, mbox_attr(hdr->xmode));
#endif

  if (mode)
    hdr_outs_bar(hdr, 47);
  else
    hdr_outs(hdr, 47);

  return XO_NONE;
}
#endif

: mail.c:mbox_cb[]

static KeyFunc mbox_cb[] =
{
#ifdef HAVE_LIGHTBAR
  XO_ITEM, mbox_item_bar,
#endif
...

: mail.c:xmbox_cb[]

KeyFunc xmbox_cb[] =
{
#ifdef HAVE_LIGHTBAR
  XO_ITEM, mbox_item_bar,
#endif
...

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