雖然sob本來就強調這樣的功能
但事實上是每個不同的程式裡面各自家各自的
除了有些地方不能用之外，也比較浪費空間、記憶體
so...直接找到最早I/O的地方，把他們寫進去，就可以省下不少資源 :)

以下為參照Ptt的寫法....

io.c:把原本的igetch()拿掉，換成如下

/* writen by Ptt       */
/* modified by wildcat */

char watermode = -1;  /* Ptt 水球回顧用的參數 */
extern  char no_oldmsg,oldmsg_count;

int
dogetch()     /* 原本的 igetch */
{
  int ch;

  if(currutmp) time(&currutmp->lastact);

  for (;;)
  {
    if (ibufsize == icurrchar)
    {
      fd_set readfds;
      struct timeval to;

      to.tv_sec = to.tv_usec = 0;
      FD_ZERO(&readfds);
      FD_SET(0, &readfds);
      if (i_newfd)
        FD_SET(i_newfd, &readfds);
      if ((ch = select(FD_SETSIZE, &readfds, NULL, NULL, &to)) <= 0)
      {
        if (flushf)
          (*flushf) ();

        if (dumb_term)
          oflush();
        else
          refresh();

        FD_ZERO(&readfds);
        FD_SET(0, &readfds);
        if (i_newfd)
          FD_SET(i_newfd, &readfds);

        while ((ch = select(FD_SETSIZE, &readfds, NULL, NULL, i_top)) < 0)
        {
          if (errno == EINTR)
            continue;
          else
          {
            perror("select");
            return -1;
          }
        }
        if (ch == 0)
          return I_TIMEOUT;
      }
      if (i_newfd && FD_ISSET(i_newfd, &readfds))
        return I_OTHERDATA;

      while ((ibufsize = read(0, inbuf, IBUFSIZE)) <= 0)
      {
        if (ibufsize == 0)
          longjmp(byebye, -1);
        if (ibufsize < 0 && errno != EINTR)
          longjmp(byebye, -1);
      }
      icurrchar = 0;
    }

    i_mode = INPUT_ACTIVE;
    ch = inbuf[icurrchar++];
    return (ch);
  }
}

int
igetch()
{
    register int ch;
    while(ch = dogetch())
    {
     switch (ch)
      {
       case Ctrl('L'):     /* 螢幕 ReDraw */
           redoscr();
           continue;
       case Ctrl('U'):     /* 呼叫使用者名單 */
           if(currutmp != NULL &&  currutmp->mode != EDITING
              && currutmp->mode && LUSERS && currutmp->mode)
             {
                 extern screenline* big_picture;
                 screenline* screen0 = calloc(t_lines, sizeof(screenline));
                 int y, x, my_newfd;
                 getyx(&y, &x);
                 memcpy(screen0, big_picture, t_lines * sizeof(screenline));
                 my_newfd = i_newfd;
                 i_newfd = 0;
                 t_users();
                 i_newfd = my_newfd;
                 memcpy(big_picture, screen0, t_lines * sizeof(screenline));
                 move(y, x);
                 free(screen0);
                 redoscr();
                 continue;
             }
           else return (ch);

        case Ctrl('R'):    /* 回水球... */
           if(currutmp == NULL) return (ch);
           else if(watermode > 0)   /* 多水球回顧 (一顆而已時) */
             {
              watermode = (watermode + oldmsg_count)% oldmsg_count + 1;
              t_display_new();
              continue;
             }
           else if (!currutmp->mode && (currutmp->chatid[0] == 2 ||
                currutmp->chatid[0] == 3) && oldmsg_count && !watermode)
            {                       /* 多水球回顧 (很多顆) */
              watermode=1;
              t_display_new();
              continue;
            }
           else if (currutmp->msgs[0].last_pid)      /* 一般回水球 */
            {
                 extern screenline* big_picture;
                 screenline* screen0 = calloc(t_lines, sizeof(screenline));
                 int y, x, my_newfd;
                 getyx(&y, &x);
                 memcpy(screen0, big_picture, t_lines * sizeof(screenline));
                 my_newfd = i_newfd;
                 i_newfd = 0;
                 show_last_call_in();
                 watermode = 0;
                 my_write(currutmp->msgs[0].last_pid, "水球丟回去：");
                 i_newfd = my_newfd;
                 memcpy(big_picture, screen0, t_lines * sizeof(screenline));
                 move(y, x);
                 free(screen0);
                 redoscr();
                 continue;
            }
           else return (ch);

        case '\n':   /* Ptt把 \n拿掉 */
           continue;
        case KEY_TAB:    /* 水球回顧 往下捲動 */
          if(watermode > 0 )
             {
              watermode = (watermode + oldmsg_count)% oldmsg_count + 1;
              t_display_new();
              continue;
             }
          else return (ch);
        case Ctrl('T'):   /* 水球回顧 往上捲動 */
          if(watermode > 0 )
             {
              watermode = (watermode + oldmsg_count - 2 )% oldmsg_count + 1;
              t_display_new();
              continue;
             }

        default:
          return (ch);
       }
    }
}
 作者  [e-mail] (瘋狂考試二日遊),           看板  WDbbsmaker
 標題  Re: Ctrl+U and Ctrl+R every where
 時間  風與塵埃的對話 (Wed Jul 29 16:43:51 1998)
───────────────────────────────────────

然後,就可以把其他地方的 Ctrl('R') Ctrl('U') Ctrl('L') 拿掉了...
(一個也不用留)
注意！edit.c的case Ctrl('U') 是控制碼的，不用拿掉

現在用起來很不錯，連pressanykey都可以看使用者名單跟回水球、getdata也可

所以....原本pip.c寫了一堆Ctrl('R')....知道了吧 :p

如果有遇到問題，請回報給我 :p


 作者  [e-mail] (瘋狂考試二日遊),           看板  WDbbsmaker
 標題  Re: Ctrl+U and Ctrl+R every where
 時間  風與塵埃的對話 (Wed Jul 29 17:03:29 1998)
────────────────────────────────────
※ 引述《wildcat (瘋狂考試二日遊)》之銘言：
:        case Ctrl('U'):     /* 呼叫使用者名單 */
:            if(currutmp != NULL &&  currutmp->mode != EDITING
:               && currutmp->mode != LUSERS && currutmp->mode)

原本寫錯