path: root/mbbsd/board.c

/* $Id: board.c,v 1.117 2003/03/31 16:05:47 victor Exp $ */
#include "bbs.h"
#define BRC_STRLEN 15       /* Length of board name */
#define BRC_MAXSIZE     24576
#define BRC_ITEMSIZE    (BRC_STRLEN + 1 + BRC_MAXNUM * sizeof( int ))
#define BRC_MAXNUM      80

static char    *
brc_getrecord(char *ptr, char *name, int *pnum, int *list)
{
    int             num;
    char           *tmp;

    strncpy(name, ptr, BRC_STRLEN);
    ptr += BRC_STRLEN;
    num = (*ptr++) & 0xff;
    tmp = ptr + num * sizeof(int);
    if (num > BRC_MAXNUM)
    num = BRC_MAXNUM;
    *pnum = num;
    memcpy(list, ptr, num * sizeof(int));
    return tmp;
}

static time_t   brc_expire_time;

static char    *
brc_putrecord(char *ptr, char *name, int num, int *list)
{
    if (num > 0 && list[0] > brc_expire_time) {
    if (num > BRC_MAXNUM)
        num = BRC_MAXNUM;

    while (num > 1 && list[num - 1] < brc_expire_time)
        num--;

    strncpy(ptr, name, BRC_STRLEN);
    ptr += BRC_STRLEN;
    *ptr++ = num;
    memcpy(ptr, list, num * sizeof(int));
    ptr += num * sizeof(int);
    }
    return ptr;
}

static int      brc_changed = 0;
static char     brc_buf[BRC_MAXSIZE];
static char     brc_name[BRC_STRLEN];
static char    *fn_boardrc = ".boardrc";
static int      brc_size;
char *brc_buf_addr=brc_buf;

void
brc_update()
{
    if (brc_changed && cuser.userlevel) {
    char            dirfile[STRLEN], *ptr;
    char            tmp_buf[BRC_MAXSIZE - BRC_ITEMSIZE], *tmp;
    char            tmp_name[BRC_STRLEN];
    int             tmp_list[BRC_MAXNUM], tmp_num;
    int             fd, tmp_size;

    ptr = brc_buf;
    if (brc_num > 0)
        ptr = brc_putrecord(ptr, brc_name, brc_num, brc_list);

    setuserfile(dirfile, fn_boardrc);
    if ((fd = open(dirfile, O_RDONLY)) != -1) {
        tmp_size = read(fd, tmp_buf, sizeof(tmp_buf));
        close(fd);
    } else {
        tmp_size = 0;
    }

    tmp = tmp_buf;
    while (tmp < &tmp_buf[tmp_size] && (*tmp >= ' ' && *tmp <= 'z')) {
        tmp = brc_getrecord(tmp, tmp_name, &tmp_num, tmp_list);
        if (strncmp(tmp_name, currboard, BRC_STRLEN))
        ptr = brc_putrecord(ptr, tmp_name, tmp_num, tmp_list);
    }
    brc_size = (int)(ptr - brc_buf);

    if ((fd = open(dirfile, O_WRONLY | O_CREAT, 0644)) != -1) {
        ftruncate(fd, 0);
        write(fd, brc_buf, brc_size);
        close(fd);
    }
    brc_changed = 0;
    }
}

static void
read_brc_buf()
{
    char            dirfile[STRLEN];
    int             fd;

    if (brc_buf[0] == '\0') {
    setuserfile(dirfile, fn_boardrc);
    if ((fd = open(dirfile, O_RDONLY)) != -1) {
        brc_size = read(fd, brc_buf, sizeof(brc_buf));
        close(fd);
    } else {
        brc_size = 0;
    }
    }
}

int
brc_initial(char *boardname)
{
    char           *ptr;
    if (strcmp(currboard, boardname) == 0) {
    return brc_num;
    }
    brc_update();
    strlcpy(currboard, boardname, sizeof(currboard));
    currbid = getbnum(currboard);
    currbrdattr = bcache[currbid - 1].brdattr;
    read_brc_buf();

    ptr = brc_buf;
    while (ptr < &brc_buf[brc_size] && (*ptr >= ' ' && *ptr <= 'z')) {
    ptr = brc_getrecord(ptr, brc_name, &brc_num, brc_list);
    if (strncmp(brc_name, currboard, BRC_STRLEN) == 0)
        return brc_num;
    }
    strncpy(brc_name, boardname, BRC_STRLEN);
    brc_num = brc_list[0] = 1;
    return 0;
}

void
brc_addlist(char *fname)
{
    int             ftime, n, i;

    if (!cuser.userlevel)
    return;

    ftime = atoi(&fname[2]);
    if (ftime <= brc_expire_time
     /* || fname[0] != 'M' || fname[1] != '.' */ ) {
    return;
    }
    if (brc_num <= 0) {
    brc_list[brc_num++] = ftime;
    brc_changed = 1;
    return;
    }
    if ((brc_num == 1) && (ftime < brc_list[0]))
    return;
    for (n = 0; n < brc_num; n++) {
    if (ftime == brc_list[n]) {
        return;
    } else if (ftime > brc_list[n]) {
        if (brc_num < BRC_MAXNUM)
        brc_num++;
        for (i = brc_num - 1; --i >= n; brc_list[i + 1] = brc_list[i]);
        brc_list[n] = ftime;
        brc_changed = 1;
        return;
    }
    }
    if (brc_num < BRC_MAXNUM) {
    brc_list[brc_num++] = ftime;
    brc_changed = 1;
    }
}

static int
brc_unread_time(time_t ftime, int bnum, int *blist)
{
    int             n;

    if (ftime <= brc_expire_time)
    return 0;

    if (brc_num <= 0)
    return 1;
    for (n = 0; n < bnum; n++) {
    if (ftime > blist[n])
        return 1;
    else if (ftime == blist[n])
        return 0;
    }
    return 0;
}

int
brc_unread(char *fname, int bnum, int *blist)
{
    int             ftime, n;

    ftime = atoi(&fname[2]);

    if (ftime <= brc_expire_time)
    return 0;

    if (brc_num <= 0)
    return 1;
    for (n = 0; n < bnum; n++) {
    if (ftime > blist[n])
        return 1;
    else if (ftime == blist[n])
        return 0;
    }
    return 0;
}

#define BRD_UNREAD 1
#define BRD_FAV    2
#define BRD_LINE   4
#define BRD_TAG    8

#define FAVNB      ".favnb"
#define FAV3       ".fav3"

#define B_TOTAL(bptr)        (SHM->total[(bptr)->bid - 1])
#define B_LASTPOSTTIME(bptr) (SHM->lastposttime[(bptr)->bid - 1])
#define B_BH(bptr)           (&bcache[(bptr)->bid - 1])
typedef struct {
    int             bid;
    unsigned char   myattr;
} __attribute__ ((packed)) boardstat_t;

typedef struct {
    short           bid;
    char            attr;
    time_t          lastvisit;
} fav_board_t;

typedef struct {
#ifdef MEM_CHECK
    int             memcheck;
#endif
    short           nDatas;
    short           nAllocs;
    char            nLines;
    fav_board_t  b[0];
} fav_t;
    
static boardstat_t *nbrd = NULL;
char   favchange = 0, choose_board_depth = 0;
fav_t *fav;
static short    brdnum;
static char     yank_flag = 1;

int cmpfav(const void *a, const void *b)
{
    if( *(short *)a > ((fav_board_t *)b)->bid )
    return 1;
    else if( *(short *)a == ((fav_board_t *)b)->bid )
    return 0;
    return -1;
}

fav_board_t *getfav(short bid)
{
    int i;
    for(i = 0; i < fav->nDatas; i++)
    if(fav->b[i].bid == bid)
        break;
    return i == fav->nDatas ? NULL : &fav->b[i];
}

char getfavattr(short bid)
{
    fav_board_t *ptr = getfav(bid);
    if( ptr == NULL )
    return 0; // default here
    else
    return ptr->attr;
}

time_t getfavtime(short bid)
{
    fav_board_t *ptr = getfav(bid);
    if( ptr == NULL )
    return login_start_time; // default here
    else
    return ptr->lastvisit;
}

void movefav(int old, int new)
{

    int i, src = -1, des = -1;
    fav_board_t tmp;

    for(i = 0; i < fav->nDatas; i++){
    if(nbrd[old].bid == fav->b[i].bid)
        src = i;
    if(nbrd[new].bid == fav->b[i].bid)
        des = i;
    }

    if(src == -1 || des == -1)
    return;
    
    tmp = fav->b[src];
    if(src < des){
    for(i = src; i < des; i++)
        fav->b[i] = fav->b[i + 1];
    }
    else{ // des < src
    for(i = src; i > des; i--)
        fav->b[i] = fav->b[i - 1];
    }
    fav->b[des] = tmp;

    brdnum = -1;
}

void delfavline(int bid, int num)
{
    int i;

    movefav(num, --brdnum);
    fav->nLines++;
    fav->nDatas--;

    for(i = 0; i < fav->nDatas; i++)
    if(fav->b[i].bid < bid)
        fav->b[i].bid++;
    for(i = 0; i < brdnum; i++)
    if(nbrd[i].bid < bid)
        nbrd[i].bid++;
}

void setfav(short bid, char attr, char mode, time_t t)
{
    /* mode: 0: 設成 off, 1: 設成 on, 2: 反相 */
    fav_board_t *ptr = getfav(bid);
    if( ptr != NULL ){
    if( mode == 2 )
        ptr->attr ^= attr;
    else if( mode )
        ptr->attr |= attr;
    else
        ptr->attr &= ~attr;
    if( t )
        ptr->lastvisit = t;
    }
    else{
    int     where;
    if( fav->nDatas == fav->nAllocs ){
#ifdef DEBUG
        vmsg("realloc fav");
#endif
        fav = realloc(fav,
            sizeof(fav_t) +
            sizeof(fav_board_t) *
            (16 + fav->nAllocs));
        memset(&fav->b[fav->nDatas], 0, sizeof(fav_board_t) * 16);
        fav->nAllocs += 16;
    }

    where = fav->nDatas;

    if( attr & BRD_LINE ){
        fav->b[where].bid = --(fav->nLines);
        fav->b[where].attr = mode ? (BRD_LINE | BRD_FAV) : 0;
    }
    else{
        fav->b[where].bid = bid ;
        fav->b[where].attr = mode ? attr : 0;
    }
    
    fav->b[where].lastvisit = t ? t : login_start_time;
    fav->nDatas++;
    }
}

void imovefav(int old)
{
    char buf[5];
    int new;
    
    getdata(b_lines - 1, 0, "請輸入新次序:", buf, sizeof(buf), DOECHO);
    new = atoi(buf) - 1;
    if (new < 0 || brdnum <= new){
    vmsg("輸入範圍有誤!");
    return;
    }
    movefav(old, new);
}

#define BRD_OLD 0
#define BRD_NEW 1
#define BRD_END 2

void updatenewfav(int mode)
{
    /* mode: 0: don't write to fav  1: write to fav */
    int i, fd;
    char fname[80], *brd;

    if(!(cuser.uflag2 & FAVNEW_FLAG))
    return;

    setuserfile(fname, FAVNB);

    if( (fd = open(fname, O_RDWR, 0600)) != -1 ){

    brd = (char *)malloc((numboards + 1) * sizeof(char));
    read(fd, brd, (numboards + 1) * sizeof(char));
    
    for(i = 0; i < numboards + 1 && brd[i] != BRD_END; i++){
        if(brd[i] == BRD_NEW){
        if(bcache[i].brdname[0] && Ben_Perm(&bcache[i])){ // check the permission if the board exsits
            if(mode)
            setfav(i + 1, BRD_FAV, 1, 0);
            brd[i] = BRD_OLD;
        }
        }
        else{
        if(!bcache[i].brdname[0])
            brd[i] = BRD_NEW;
        }
    }
    if( i < numboards + 1) // the board number may change
        for(i-- ; i < numboards; i++){
        if(bcache[i].brdname[0] && Ben_Perm(&bcache[i])){
            if(mode)
            setfav(i + 1, BRD_FAV, 1, 0);
            brd[i] = BRD_OLD;
        }
        else
            brd[i] = BRD_NEW;
        }

    brd[i] = BRD_END;
    
    lseek(fd, 0, SEEK_SET);
    write(fd, brd, (numboards + 1 ) * sizeof(char));
    free(brd);
    close(fd);
    }
}

void load_brdbuf(void)
{
    static  char    firsttime = 1;
    int     fd, r, w;
    char    fname[80];

    setuserfile(fname, FAV3);
    if( (fd = open(fname, O_RDONLY)) == -1 ){
    // not found.
    int i;
    char favrec;
    fav = (fav_t *)malloc(sizeof(fav_t) +
                    sizeof(fav_board_t) * 16);
    fav->nDatas = 0;
    fav->nAllocs = 16;
    fav->nLines = 0;
    favchange = 1;

    setuserfile(fname, ".fav2");

    if( (fd = open(fname, O_RDONLY)) != -1 ){
        for( i = 1; i <= numboards; i++){
        if(read(fd, &favrec, sizeof(char)) < 0)
            break;
        if( (favrec & BRD_FAV) )
            setfav(i, BRD_FAV, 1, 0);
        }
        close(fd);
    }
    }
    else{
    short   nDatas;
    char    nLines;
    read(fd, &nDatas, sizeof(nDatas));
    read(fd, &nLines, sizeof(nLines));
    fav = (fav_t *)malloc(sizeof(fav_t) +
                    sizeof(fav_board_t) * (nDatas + 16));
    fav->nDatas = nDatas;
    fav->nAllocs = nDatas + 16;
    fav->nLines = nLines;
    read(fd, fav->b, sizeof(fav_board_t) * nDatas);
    close(fd);
    }

    // check if fav is correct
    // 'r' for current reading position, 'w' for current writing position
    // 'i' for checking duplication
    for( r = w = 0 ; r < fav->nDatas ; ++r )
    if( fav->b[r].attr & BRD_FAV )                    // 須是 BRD_FAV
        if( (fav->b[r].bid < 0) ||                    // 分隔線
        (fav->b[r].bid > 0 &&                     // bid 在合理範圍
         fav->b[r].bid < numboards &&
         bcache[fav->b[r].bid - 1].brdname[0]) ){ // 看板存在
        int     i;
        for( i = 0 ; i < w ; ++i )
            if( fav->b[i].bid == fav->b[r].bid )
            break;
        if( i == w )                              // 無和之前的重覆
            fav->b[w++] = fav->b[r];
        }
    fav->nDatas = w;

    updatenewfav(1);
#ifdef MEM_CHECK
    fav->memcheck = MEM_CHECK;
#endif
    firsttime = 0;
}

void
init_brdbuf()
{
    brc_expire_time = login_start_time - 365 * 86400;
}

void
save_brdbuf(void)
{
    int     r, w, fd;
    char    fname[80];
    if( !fav )
    return;
    /*
      favchange is not implement yet 
      if( !favchange )
          return;
    */
#ifdef MEM_CHECK
    if( fav->memcheck != MEM_CHECK )
    return;
#endif

    fav->nLines = 0;
    for( r = w = 0 ; r < fav->nDatas ; ++r ){
    if( ( fav->b[r].attr & BRD_LINE ) ||
         (fav->b[r].attr & BRD_FAV && bcache[fav->b[r].bid - 1].brdname[0])){
        fav->b[w++] = fav->b[r];
        if(fav->b[w].attr & BRD_LINE)
        fav->nLines--;
    }
    }
    fav->nDatas = w;
    setuserfile(fname, FAV3);
    if( (fd = open(fname, O_WRONLY | O_CREAT, 0600)) != -1 ){
    int i;
    write(fd, &fav->nDatas, sizeof(short));
    write(fd, &fav->nLines, sizeof(char));
    for(i = 0; i < fav->nDatas; i++)
        if(fav->b[i].attr & BRD_FAV)
        write(fd, &fav->b[i], sizeof(fav_board_t));
    close(fd);
    }
    free(fav);
    fav = NULL;
}

int
Ben_Perm(boardheader_t * bptr)
{
    register int    level, brdattr;
    register char  *ptr;

    level = bptr->level;
    brdattr = bptr->brdattr;

    if (HAS_PERM(PERM_SYSOP))
    return 1;

    ptr = bptr->BM;
    if (is_BM(ptr))
    return 1;

    /* 祕密看板：核對首席板主的好友名單 */

    if (brdattr & BRD_HIDE) {   /* 隱藏 */
    if (hbflcheck((int)(bptr - bcache) + 1, currutmp->uid)) {
        if (brdattr & BRD_POSTMASK)
        return 0;
        else
        return 2;
    } else
        return 1;
    }
    /* 限制閱讀權限 */
    if (level && !(brdattr & BRD_POSTMASK) && !HAS_PERM(level))
    return 0;

    return 1;
}

#if 0
static int
have_author(char *brdname)
{
    char            dirname[100];

    snprintf(dirname, sizeof(dirname),
         "正在搜尋作者%s 看板:%s.....",
         currauthor, brdname);
    move(b_lines, 0);
    clrtoeol();
    outs(dirname);
    refresh();

    setbdir(dirname, brdname);
    str_lower(currowner, currauthor);

    return search_rec(dirname, cmpfowner);
}
#endif

static int
check_newpost(boardstat_t * ptr)
{               /* Ptt 改 */
    int             tbrc_list[BRC_MAXNUM], tbrc_num;
    char            bname[BRC_STRLEN];
    char           *po;
    time_t          ftime;

    ptr->myattr &= ~BRD_UNREAD;
    if (B_BH(ptr)->brdattr & BRD_GROUPBOARD)
    return 0;

    if (B_TOTAL(ptr) == 0)
    setbtotal(ptr->bid);
    if (B_TOTAL(ptr) == 0)
    return 0;
    ftime = B_LASTPOSTTIME(ptr);
    if( ftime > now )
    ftime = B_LASTPOSTTIME(ptr) = now - 1;
    read_brc_buf();
    po = brc_buf;
    while (po < &brc_buf[brc_size] && (*po >= ' ' && *po <= 'z')) {
    po = brc_getrecord(po, bname, &tbrc_num, tbrc_list);
    if (strncmp(bname, B_BH(ptr)->brdname, BRC_STRLEN) == 0) {
        if (brc_unread_time(ftime, tbrc_num, tbrc_list)) {
        ptr->myattr |= BRD_UNREAD;
        }
        return 1;
    }
    }

    ptr->myattr |= BRD_UNREAD;
    return 1;
}

static void
load_uidofgid(const int gid, const int type)
{
    boardheader_t  *bptr, *currbptr;
    int             n, childcount = 0;
    currbptr = &bcache[gid - 1];
    for (n = 0; n < numboards; ++n) {
    bptr = SHM->bsorted[type][n];
    if (bptr->brdname[0] == '\0')
        continue;
    if (bptr->gid == gid) {
        if (currbptr == &bcache[gid - 1])
        currbptr->firstchild[type] = bptr;
        else {
        currbptr->next[type] = bptr;
        currbptr->parent = &bcache[gid - 1];
        }
        childcount++;
        currbptr = bptr;
    }
    }
    bcache[gid - 1].childcount = childcount;
    if (currbptr == &bcache[gid - 1])
    currbptr->firstchild[type] = (boardheader_t *) ~ 0;
    else
    currbptr->next[type] = (boardheader_t *) ~ 0;
}
static boardstat_t *
addnewbrdstat(int n, int state)
{
    boardstat_t    *ptr;

    ptr = &nbrd[brdnum++];
    //boardheader_t  *bptr = &bcache[n];
    //ptr->total = &(SHM->total[n]);
    //ptr->lastposttime = &(SHM->lastposttime[n]);
    
    ptr->bid = n + 1;
    ptr->myattr = getfavattr(ptr->bid);
    if ((B_BH(ptr)->brdattr & BRD_HIDE) && state == 1)
    B_BH(ptr)->brdattr |= BRD_POSTMASK;
    check_newpost(ptr);
    return ptr;
}

static int
cmpboardfriends(const void *brd, const void *tmp)
{
    return ((B_BH((boardstat_t*)tmp)->nuser) -
        (B_BH((boardstat_t*)brd)->nuser));
}

static int
favcmpboardname(const void *brd, const void *tmp)
{
    int     b1 = ((fav_board_t *)brd)->bid;
    int     b2 = ((fav_board_t *)tmp)->bid;

    if( b1 <= 0 || b2 <= 0 ) // 分隔線
    return 1;

    return strcasecmp(bcache[b1 - 1].brdname, bcache[b2 - 1].brdname);
}

static int
favcmpboardclass(const void *brd, const void *tmp)
{
    int     b1 = ((fav_board_t *)brd)->bid;
    int     b2 = ((fav_board_t *)tmp)->bid;
    int     cmp;

    if( b1 <= 0 || b2 <= 0 ) // 分隔線
    return 1;

    cmp = strncasecmp(bcache[b1 - 1].title, bcache[b2 - 1].title, 4);
    if( cmp )
    return cmp;
    else
    return strcasecmp(bcache[b1 - 1].brdname, bcache[b2 - 1].brdname);
}

static void
load_boards(char *key)
{
    boardheader_t  *bptr = NULL;
    int             type = cuser.uflag & BRDSORT_FLAG ? 1 : 0;
    int             i, n;
    int             state;
#ifdef CRITICAL_MEMORY
    boardstat_t    *tmpnbrd;
#endif

    if (class_bid > 0) {
    bptr = &bcache[class_bid - 1];
    if (bptr->firstchild[type] == NULL || bptr->childcount <= 0)
        load_uidofgid(class_bid, type);
    }
    brdnum = 0;
    if (nbrd) {
        free(nbrd);
    nbrd = NULL;
    }
    if (class_bid <= 0) {
    nbrd = (boardstat_t *) MALLOC(sizeof(boardstat_t) * numboards);
    if( yank_flag == 0 ){ // fav mode
            for( i = 0 ; i < fav->nDatas ; ++i ){
        if( fav->b[i].attr & BRD_FAV ){
            if( fav->b[i].attr & BRD_LINE )
            addnewbrdstat(fav->b[i].bid - 1, BRD_FAV | BRD_LINE);
            else{
            bptr = &bcache[ fav->b[i].bid - 1 ];
            if( (state = Ben_Perm(bptr)) )
                addnewbrdstat(fav->b[i].bid - 1, state);
            }
        }
        }
    }
    else{ // general case
        for (i = 0; i < numboards; i++) {
        if ((bptr = SHM->bsorted[type][i]) == NULL)
            continue;
        n = (int)(bptr - bcache);
        if (!bptr->brdname[0] ||
            (bptr->brdattr & BRD_GROUPBOARD) ||
            !((state = Ben_Perm(bptr)) || (currmode & MODE_MENU)) ||
            (key[0] && !strcasestr(bptr->title, key)) ||
            (class_bid == -1 && bptr->nuser < 5))
            continue;
        addnewbrdstat(n, state);
        }
    }
    if (class_bid == -1)
        qsort(nbrd, brdnum, sizeof(boardstat_t), cmpboardfriends);

    } else {
    nbrd = (boardstat_t *) MALLOC(bptr->childcount * sizeof(boardstat_t));
    for (bptr = bptr->firstchild[type]; bptr != (boardheader_t *) ~ 0;
         bptr = bptr->next[type]) {
        n = (int)(bptr - bcache);
        if (!((state = Ben_Perm(bptr)) || (currmode & MODE_MENU))
        || (yank_flag == 0 && !(getfavattr(n) & BRD_FAV)) ||
        (key[0] && !strcasestr(bptr->title, key)))
        continue;
        addnewbrdstat(n, state);
    }
    }
#ifndef CRITICAL_MEMORY
    nbrd = realloc(nbrd, sizeof(boardstat_t) * brdnum);
#else
    tmpnbrd = (boardstat_t *) malloc(sizeof(boardstat_t) * brdnum);
    memcpy(tmpnbrd, nbrd, sizeof(boardstat_t) * brdnum);
    FREE(nbrd);
    nbrd = tmpnbrd;
#endif
}

static int
search_board()
{
    int             num;
    char            genbuf[IDLEN + 2];
    move(0, 0);
    clrtoeol();
    CreateNameList();
    for (num = 0; num < brdnum; num++)
    AddNameList(B_BH(&nbrd[num])->brdname);
    namecomplete(MSG_SELECT_BOARD, genbuf);
    FreeNameList();
    toplev = NULL;

    for (num = 0; num < brdnum; num++)
    if (!strcasecmp(B_BH(&nbrd[num])->brdname, genbuf))
        return num;
    return -1;
}

static int
unread_position(char *dirfile, boardstat_t * ptr)
{
    fileheader_t    fh;
    char            fname[FNLEN];
    register int    num, fd, step, total;

    total = B_TOTAL(ptr);
    num = total + 1;
    if ((ptr->myattr & BRD_UNREAD) && (fd = open(dirfile, O_RDWR)) > 0) {
    if (!brc_initial(B_BH(ptr)->brdname)) {
        num = 1;
    } else {
        num = total - 1;
        step = 4;
        while (num > 0) {
        lseek(fd, (off_t) (num * sizeof(fh)), SEEK_SET);
        if (read(fd, fname, FNLEN) <= 0 ||
            !brc_unread(fname, brc_num, brc_list))
            break;
        num -= step;
        if (step < 32)
            step += step >> 1;
        }
        if (num < 0)
        num = 0;
        while (num < total) {
        lseek(fd, (off_t) (num * sizeof(fh)), SEEK_SET);
        if (read(fd, fname, FNLEN) <= 0 ||
            brc_unread(fname, brc_num, brc_list))
            break;
        num++;
        }
    }
    close(fd);
    }
    if (num < 0)
    num = 0;
    return num;
}

static void
brdlist_foot()
{
    prints("\033[34;46m  選擇看板  \033[31;47m  (c)\033[30m新文章模式  "
       "\033[31m(v/V)\033[30m標記已讀/未讀  \033[31m(y)\033[30m篩選%s"
       "  \033[31m(m)\033[30m切換最愛  \033[m",
       yank_flag == 0 ? "最愛" : yank_flag == 1 ? "部份" : "全部");
}

static void
show_brdlist(int head, int clsflag, int newflag)
{
    int             myrow = 2;
    if (class_bid == 1) {
    currstat = CLASS;
    myrow = 6;
    showtitle("分類看板", BBSName);
    movie(0);
    move(1, 0);
    outs(
        "                                                              "
        "◣  ╭—\033[33m●\n"
        "                                                    ╬—  \033[m "
        "◢█\033[47m⊙\033[40m██◣╤\n"
        "  \033[44m   ︿︿︿︿︿︿︿︿                               "
        "\033[33m║\033[m\033[44m ◣◢███▼▼▼║ \033[m\n"
        "  \033[44m                                                  "
        "\033[33m  \033[m\033[44m ◤◥███▲▲▲ ║\033[m\n"
        "                                  ︿︿︿︿︿︿︿︿    \033[33m"
        "│\033[m   ◥████◤ ║\n"
        "                                                      \033[33m╫"
        "——\033[m  ◤      —＋\033[m");
    } else if (clsflag) {
    showtitle("看板列表", BBSName);
    prints("[←]主選單 [→]閱\讀 [↑↓]選擇 [y]載入 [S]排序 [/]搜尋 "
           "[TAB]文摘‧看板 [h]求助\n"
           "\033[7m%-20s 類別 轉信%-31s人氣 板    主     \033[m",
           newflag ? "總數 未讀 看  板" : "  編號  看  板",
           "  中   文   敘   述");
    move(b_lines, 0);
    brdlist_foot();
    }
    if (brdnum > 0) {
    boardstat_t    *ptr;
    char    *color[8] = {"", "\033[32m",
        "\033[33m", "\033[36m", "\033[34m", "\033[1m",
    "\033[1;32m", "\033[1;33m"};
    char    *unread[2] = {"\33[37m  \033[m", "\033[1;31mˇ\033[m"};

    while (++myrow < b_lines) {
        move(myrow, 0);
        clrtoeol();
        if (head < brdnum) {
        ptr = &nbrd[head++];
        if(ptr->myattr & BRD_LINE){
            prints("%5d %c ------------      ------------------------------------------", head, ptr->myattr & BRD_TAG ? 'D' : ' ');
            continue;
        }
        if (class_bid == 1)
            prints("          ");
        if (!newflag) {
            prints("%5d%c%s", head,
               !(B_BH(ptr)->brdattr & BRD_HIDE) ? ' ' :
               (B_BH(ptr)->brdattr & BRD_POSTMASK) ? ')' : '-',
               (ptr->myattr & BRD_TAG) ? "D " :
               (B_BH(ptr)->brdattr & BRD_GROUPBOARD) ? "  " :
               unread[ptr->myattr & BRD_UNREAD]);
        } else {
            if (newflag) {
            if ((B_BH(ptr)->brdattr & BRD_GROUPBOARD))
                prints("        ");
            else
                prints("%6d%s", (int)(B_TOTAL(ptr)),
                    unread[ptr->myattr & BRD_UNREAD]);
            }
        }
        if (class_bid != 1) {
            prints("%s%-13s\033[m%s%5.5s\033[0;37m%2.2s\033[m"
               "%-34.34s",
               ((ptr->myattr & BRD_FAV) &&
                !(cuser.uflag2 & FAVNOHILIGHT))? "\033[1;36m" : "",
                B_BH(ptr)->brdname,
                color[(unsigned int)
                (B_BH(ptr)->title[1] + B_BH(ptr)->title[2] +
                 B_BH(ptr)->title[3] + B_BH(ptr)->title[0]) & 07],
                B_BH(ptr)->title, B_BH(ptr)->title + 5, B_BH(ptr)->title + 7);

            if (B_BH(ptr)->brdattr & BRD_BAD)
            prints(" X ");
            else if (B_BH(ptr)->nuser >= 100)
            prints("\033[1mHOT\033[m");
            else if (B_BH(ptr)->nuser > 50)
            prints("\033[1;31m%2d\033[m ", B_BH(ptr)->nuser);
            else if (B_BH(ptr)->nuser > 10)
            prints("\033[1;33m%2d\033[m ", B_BH(ptr)->nuser);
            else if (B_BH(ptr)->nuser > 0)
            prints("%2d ", B_BH(ptr)->nuser);
            else
            prints(" %c ", B_BH(ptr)->bvote ? 'V' : ' ');
            prints("%.*s\033[K", t_columns - 67, B_BH(ptr)->BM);
        } else {
            prints("%-40.40s %.*s", B_BH(ptr)->title + 7,
               t_columns - 67, B_BH(ptr)->BM);
        }
        }
        clrtoeol();
    }
    }
}

static char    *choosebrdhelp[] = {
    "\0看板選單輔助說明",
    "\01基本指令",
    "(p)(↑)/(n)(↓)上一個看板 / 下一個看板",
    "(P)(^B)(PgUp)  上一頁看板",
    "(N)(^F)(PgDn)  下一頁看板",
    "($)/(s)/(/)    最後一個看板 / 搜尋看板 / 以中文搜尋看板關鍵字",
    "(數字)         跳至該項目",
    "\01進階指令",
    "(^W)           迷路了 我在哪裡",
    "(r)(→)(Rtn)   進入多功\能閱\讀選單",
    "(q)(←)        回到主選單",
    "(y/Z)          我的最愛,訂閱\看板,所有看板/訂閱\新開看板",
    "(L)            加入分隔線至我的最愛",
    "(v/V)          通通看完/全部未讀",
    "(S)            按照字母/分類排序",
    "(t/^T/^A/^D)   標記看板/取消所有標記/ 將已標記者加入/移出我的最愛",
    "(m/M)          把看板加入或移出我的最愛,移除分隔線/搬移我的最愛",
    "\01小組長指令",
    "(E/W/B)        設定看板/設定小組備忘/開新看板",
    "(^P)           移動已標記看板到此分類",
    NULL
};


static void
set_menu_BM(char *BM)
{
    if (HAS_PERM(PERM_ALLBOARD) || is_BM(BM)) {
    currmode |= MODE_MENU;
    cuser.userlevel |= PERM_SYSSUBOP;
    }
}

static char    *privateboard =
"\n\n\n\n         對不起 此板目前只准看板好友進入  請先向板主申請入境許\可";

static void
choose_board(int newflag)
{
    static int      num = 0;
    boardstat_t    *ptr;
    int             head = -1, ch = 0, currmodetmp, tmp, tmp1, bidtmp;
    char            keyword[13] = "";

    setutmpmode(newflag ? READNEW : READBRD);
    if( fav == NULL )
    load_brdbuf();
    ++choose_board_depth;
    brdnum = 0;
    if (!cuser.userlevel)   /* guest yank all boards */
    yank_flag = 2;

    do {
    if (brdnum <= 0) {
        load_boards(keyword);
        if (brdnum <= 0) {
        if (keyword[0] != 0) {
            mprints(b_lines - 1, 0, "沒有任何看板標題有此關鍵字 "
                "(板主應注意看板標題命名)");
            pressanykey();
            keyword[0] = 0;
            brdnum = -1;
            continue;
        }
        if (yank_flag < 2) {
            brdnum = -1;
            yank_flag++;
            continue;
        }
        if (HAS_PERM(PERM_SYSOP) || (currmode & MODE_MENU)) {
            if (m_newbrd(0) == -1)
            break;
            brdnum = -1;
            continue;
        } else
            break;
        }
        head = -1;
    }
    if (num < 0)
        num = 0;
    else if (num >= brdnum)
        num = brdnum - 1;

    if (head < 0) {
        if (newflag) {
        tmp = num;
        while (num < brdnum) {
            ptr = &nbrd[num];
            if (ptr->myattr & BRD_UNREAD)
            break;
            num++;
        }
        if (num >= brdnum)
            num = tmp;
        }
        head = (num / p_lines) * p_lines;
        show_brdlist(head, 1, newflag);
    } else if (num < head || num >= head + p_lines) {
        head = (num / p_lines) * p_lines;
        show_brdlist(head, 0, newflag);
    }
    if (class_bid == 1)
        ch = cursor_key(7 + num - head, 10);
    else
        ch = cursor_key(3 + num - head, 0);

    switch (ch) {
    case Ctrl('W'):
        whereami(0, NULL, NULL);
        head = -1;
        break;
    case 'e':
    case KEY_LEFT:
    case EOF:
        ch = 'q';
    case 'q':
        if (keyword[0]) {
        keyword[0] = 0;
        brdnum = -1;
        ch = ' ';
        }
        break;
    case 'c':
        show_brdlist(head, 1, newflag ^= 1);
        break;
    case KEY_PGUP:
    case 'P':
    case 'b':
    case Ctrl('B'):
        if (num) {
        num -= p_lines;
        break;
        }
    case KEY_END:
    case '$':
        num = brdnum - 1;
        break;
    case ' ':
    case KEY_PGDN:
    case 'N':
    case Ctrl('F'):
        if (num == brdnum - 1)
        num = 0;
        else
        num += p_lines;
        break;
    case Ctrl('C'):
        cal();
        show_brdlist(head, 1, newflag);
        break;
    case Ctrl('I'):
        t_idle();
        show_brdlist(head, 1, newflag);
        break;
    case KEY_UP:
    case 'p':
    case 'k':
        if (num-- <= 0)
        num = brdnum - 1;
        break;
    case 't':
        ptr = &nbrd[num];
        favchange = 1;
        setfav(ptr->bid, BRD_TAG, 2, 0);
        ptr->myattr ^= BRD_TAG;
        head = 9999;
    case KEY_DOWN:
    case 'n':
    case 'j':
        if (++num < brdnum)
        break;
    case '0':
    case KEY_HOME:
        num = 0;
        break;
    case '1':
    case '2':
    case '3':
    case '4':
    case '5':
    case '6':
    case '7':
    case '8':
    case '9':
        if ((tmp = search_num(ch, brdnum)) >= 0)
        num = tmp;
        brdlist_foot();
        break;
    case 'F':
    case 'f':
        if (class_bid>0 && HAS_PERM(PERM_SYSOP)) {
        bcache[class_bid - 1].firstchild[cuser.uflag & BRDSORT_FLAG ? 1 : 0]
            = NULL;
        brdnum = -1;
        }
        break;
    case 'h':
        show_help(choosebrdhelp);
        show_brdlist(head, 1, newflag);
        break;
    case '/':
        getdata_buf(b_lines - 1, 0, "請輸入看板中文關鍵字:",
            keyword, sizeof(keyword), DOECHO);
        brdnum = -1;
        break;
    case 'S':
        if(yank_flag == 0){
        char    input[4];
        move(b_lines - 2, 0);
        prints("重新排序看板 "
            "\033[1;33m(注意, 這個動作會覆寫原來設定)\033[m \n");
        getdata(b_lines - 1, 0,
            "排序方式 (1)按照板名排序 (2)按照類別排序 ==> [0]取消 ",
            input, sizeof(input), DOECHO);
        if( input[0] == '1' )
            qsort(&fav->b, fav->nDatas, sizeof(fav_board_t), 
                favcmpboardname);
        else if( input[0] == '2' )
            qsort(&fav->b, fav->nDatas, sizeof(fav_board_t), 
                favcmpboardclass);
        }
        else
        cuser.uflag ^= BRDSORT_FLAG;
        brdnum = -1;
        break;
    case 'y':
        yank_flag = (yank_flag + 1) % 2;
        brdnum = -1;
        break;
    case Ctrl('D'):
        for (tmp = 0; tmp < fav->nDatas; tmp++) {
        if (fav->b[tmp].attr & BRD_TAG) {
            favchange = 1;
            fav->b[tmp].attr &= ~BRD_FAV;
            fav->b[tmp].attr &= ~BRD_TAG;
            fav->nDatas--;
        }
        }
        brdnum = -1;
        break;
    case Ctrl('A'):
        for (tmp = 0; tmp < fav->nDatas; tmp++) {
        if (fav->b[tmp].attr & BRD_TAG) {
            favchange = 1;
            fav->b[tmp].attr |= BRD_FAV;
            fav->b[tmp].attr &= ~BRD_TAG;
        }
        }
        brdnum = -1;
        break;
    case Ctrl('T'):
        for (tmp = 0; tmp < fav->nDatas; tmp++)
        fav->b[tmp].attr &= ~BRD_TAG;
        favchange = 1;
        brdnum = -1;
        break;
    case Ctrl('P'):
        if (class_bid != 0 &&
        (HAS_PERM(PERM_SYSOP) || (currmode & MODE_MENU))) {
        for (tmp = 0; tmp < fav->nDatas; tmp++) {
            short   bid = fav->b[tmp].bid;
            boardheader_t  *bh = &bcache[ bid - 1 ];
            /*
            if (!(fav->b[tmp].attr & BRD_TAG) || bh->gid == class_bid)
            continue;
            */
            if( !(fav->b[tmp].attr & BRD_TAG) )
            continue;
            favchange = 1;
            fav->b[tmp].attr &= ~BRD_TAG;
            if (bh->gid != class_bid) {
            bh->gid = class_bid;
            substitute_record(FN_BOARD, bh,
                      sizeof(boardheader_t), bid);
            reset_board(bid);
            log_usies("SetBoardGID", bh->brdname);
            }
        }
        brdnum = -1;
        }
        break;
    case 'L':
        if (HAS_PERM(PERM_BASIC)) {
        if(fav->nDatas > FAVMAX){
            vmsg("你的最愛太多了啦 真花心");
            break;
        }
        setfav(0, BRD_FAV | BRD_LINE, 1, 0);
        nbrd[brdnum].bid = fav->nLines;
        movefav(brdnum, num);
        favchange = 1;
        brdnum = -1;
        head = 9999;
        }
        break;
    case 'm':
        if (HAS_PERM(PERM_BASIC)) {
        if(nbrd[num].myattr & BRD_LINE){
            delfavline(nbrd[num].bid, num);
            brdnum = -1;
        }
        else if(fav->nDatas > FAVMAX){
            vmsg("你的最愛太多了啦 真花心");
            break;
        }
        else{
            setfav(nbrd[num].bid, BRD_FAV, 2, 0);
            nbrd[num].myattr ^= BRD_FAV;
        }
        favchange = 1;
        head = 9999;
        }
        break;
    case 'M':
        if (HAS_PERM(PERM_BASIC)) {
        imovefav(num);
        favchange = 1;
        head = 9999;
        }
        break;
    case 'K':
        if (HAS_PERM(PERM_BASIC)) {
        char buf[2], fname[80];
#if 1
        getdata(b_lines - 1, 0, "請確定是否匯入舊的我的最愛(警告! 這將覆寫我的最愛!)[y/N]", buf, sizeof(buf), DOECHO);
#else
        getdata(b_lines - 1, 0, "請選擇匯入列表 1)我的最愛 2)訂閱\看板 (警告! 這將覆寫我的最愛!)", buf, sizeof(buf), DOECHO);
        tmp = atoi(buf);
        if(tmp == 1){
#endif
#if 1
        if(buf[0] == 'Y' || buf[0] == 'y'){
#endif
                setuserfile(fname, FAV3);
            unlink(fname);
            load_brdbuf();
        }
#if 0
        else if(tmp == 2){
            int fd, zap, count = 0;
            setuserfile(fname, FAV3);
            unlink(fname);
            setuserfile(fname, ".bbsrc");
            if( (fd = open(fname, O_RDONLY)) != -1 ){
            for(tmp = 0; tmp < numboards; tmp++){
                if(read(fd, &zap, sizeof(zap)) > 0){
                if(zap > 0 && bcache[tmp].brdname[0]){
                    if(getfav(tmp + 1) != NULL){
                    setfav(tmp + 1, BRD_FAV, 1, zap);
                    count++;
                    }
                }
                }
                if(count >= FAVMAX){
                vmsg("已到達最愛上限 :(");
                break;
                }
            }
            }
        }
#endif
        brdnum = -1;
        }
        break;
    case 'z':
        vmsg("嘿嘿 這個功\能已經被我的最愛取代掉了喔!");
        break;
    case 'Z':
        cuser.uflag2 ^= FAVNEW_FLAG;
        if(cuser.uflag2 & FAVNEW_FLAG){
        char fname[80];

        setuserfile(fname, FAVNB);

        if( (tmp = open(fname, O_RDONLY, 0600)) != -1 ){
            close(tmp);
            updatenewfav(0);
        }
        else{
            char stat;
            if( (tmp = open(fname, O_WRONLY | O_CREAT, 0600)) != -1 ){
            for(tmp1 = 0; tmp1 < numboards; tmp1++){
                if(bcache[tmp1].brdname[0] && Ben_Perm(&bcache[tmp1]))
                stat = BRD_OLD;
                else
                stat = BRD_NEW;
                write(tmp, &stat, sizeof(char));
            }
            stat = BRD_END;
            write(tmp, &stat, sizeof(char));
            close(tmp);
            }
        }
        }
        vmsg((cuser.uflag2 & FAVNEW_FLAG) ? "切換為訂閱\新看板模式" : "切換為正常模式");
        break;
    case 'v':
    case 'V':
        if(nbrd[num].bid < 0)
        break;
        ptr = &nbrd[num];
        brc_initial(B_BH(ptr)->brdname);
        if (ch == 'v') {
        ptr->myattr &= ~BRD_UNREAD;
        favchange = 1;
        brc_list[0] = now;
        setfav(ptr->bid, 0, 0, now);
        } else {
        favchange = 1;
        brc_list[0] = 1;
        setfav(ptr->bid, 0, 0, 1);
        ptr->myattr |= BRD_UNREAD;
        }
        brc_num = brc_changed = 1;
        brc_update();
        show_brdlist(head, 0, newflag);
        break;
    case 's':
        if ((tmp = search_board()) == -1) {
        show_brdlist(head, 1, newflag);
        break;
        }
        num = tmp;
        break;
    case 'E':
        if (HAS_PERM(PERM_SYSOP) || (currmode & MODE_MENU)) {
        ptr = &nbrd[num];
        move(1, 1);
        clrtobot();
        m_mod_board(B_BH(ptr)->brdname);
        brdnum = -1;
        }
        break;
    case 'R':
        if (HAS_PERM(PERM_SYSOP) || (currmode & MODE_MENU)) {
        m_newbrd(1);
        brdnum = -1;
        }
        break;
    case 'B':
        if (HAS_PERM(PERM_SYSOP) || (currmode & MODE_MENU)) {
        m_newbrd(0);
        brdnum = -1;
        }
        break;
    case 'W':
        if (class_bid > 0 &&
        (HAS_PERM(PERM_SYSOP) || (currmode & MODE_MENU))) {
        char            buf[128];
        setbpath(buf, bcache[class_bid - 1].brdname);
        mkdir(buf, 0755);   /* Ptt:開群組目錄 */
        b_note_edit_bname(class_bid);
        brdnum = -1;
        }
        break;
    case KEY_RIGHT:
    case '\n':
    case '\r':
    case 'r':
        {
        char            buf[STRLEN];

        ptr = &nbrd[num];
        if(ptr->myattr & BRD_LINE)
            break;

        if (!(B_BH(ptr)->brdattr & BRD_GROUPBOARD)) {   /* 非sub class */
            if (!(B_BH(ptr)->brdattr & BRD_HIDE) ||
            (B_BH(ptr)->brdattr & BRD_POSTMASK)) {
            brc_initial(B_BH(ptr)->brdname);

            if (newflag) {
                setbdir(buf, currboard);
                tmp = unread_position(buf, ptr);
                head = tmp - t_lines / 2;
                getkeep(buf, head > 1 ? head : 1, tmp + 1);
            }
            board_visit_time = getfavtime(ptr->bid);
            Read();
            check_newpost(ptr);
            head = -1;
            setutmpmode(newflag ? READNEW : READBRD);
            } else {
            setbfile(buf, B_BH(ptr)->brdname, FN_APPLICATION);
            if (more(buf, YEA) == -1) {
                move(1, 0);
                clrtobot();
                outs(privateboard);
                pressanykey();
            }
            head = -1;
            }
        } else {    /* sub class */
            move(12, 1);
            bidtmp = class_bid;
            currmodetmp = currmode;
            tmp1 = num;
            num = 0;
            if (!(B_BH(ptr)->brdattr & BRD_TOP))
            class_bid = ptr->bid;
            else
            class_bid = -1; /* 熱門群組用 */

            if (!(currmode & MODE_MENU))    /* 如果還沒有小組長權限 */
            set_menu_BM(B_BH(ptr)->BM);

            if (now < B_BH(ptr)->bupdate) {
            setbfile(buf, B_BH(ptr)->brdname, fn_notes);
            if (more(buf, NA) != -1)
                pressanykey();
            }
            tmp = currutmp->brc_id;
            setutmpbid(ptr->bid);
            free(nbrd);
            nbrd = NULL;
            if (yank_flag == 0 ) {
                yank_flag = 1;
                choose_board(0);
                yank_flag = 0;
            }
            else
                choose_board(0);
            currmode = currmodetmp; /* 離開板板後就把權限拿掉喔 */
            num = tmp1;
            class_bid = bidtmp;
            setutmpbid(tmp);
            brdnum = -1;
        }
        }
    }
    } while (ch != 'q');
    free(nbrd);
    nbrd = NULL;
    --choose_board_depth;
}

int
root_board()
{
    class_bid = 1;
    yank_flag = 1;
    choose_board(0);
    return 0;
}

int
Boards()
{
    class_bid = 0;
    yank_flag = 0;
    choose_board(0);
    return 0;
}


int
New()
{
    int             mode0 = currutmp->mode;
    int             stat0 = currstat;

    class_bid = 0;
    choose_board(1);
    currutmp->mode = mode0;
    currstat = stat0;
    return 0;
}

/*
 * int v_favorite(){ char fname[256]; char inbuf[2048]; FILE* fp; int nGroup;
 * char* strtmp;
 * 
 * setuserfile(fname,str_favorite);
 * 
 * if (!(fp=fopen(fname,"r"))) return -1; move(0,0); clrtobot();
 * fgets(inbuf,sizeof(inbuf),fp); nGroup=atoi(inbuf);
 * 
 * currutmp->nGroup=0; currutmp->ninRoot=0;
 * 
 * while(nGroup!=currutmp->nGroup+1){ fgets(inbuf,sizeof(inbuf),fp);
 * prints("%s\n",strtmp=strtok(inbuf," \n"));
 * strcpy(currutmp->gfavorite[currutmp->nGroup++],strtmp);
 * while((strtmp=strtok(NULL, " \n"))){ prints("     %s
 * %d\n",strtmp,getbnum(strtmp)); } currutmp->nGroup++; }
 * prints("+++%d+++\n",currutmp->nGroup);
 * 
 * fgets(inbuf,sizeof(inbuf),fp);
 * 
 * for(strtmp=strtok(inbuf, " \n");strtmp;strtmp=strtok(NULL, " \n")){ if
 * (strtmp[0]!='#') prints("*** %s %d\n",strtmp, getbnum(strtmp)); else
 * prints("*** %s %d\n",strtmp+1, -1); currutmp->ninRoot++; }
 * 
 * fclose(fp); pressanykey(); return 0; }
 */