Merge from brc2 branch.

git-svn-id: http://opensvn.csie.org/pttbbs/trunk/pttbbs@1695 63ad8ddf-47c3-0310-b6dd-a9e9d9715204

8 files changed, 453 insertions, 313 deletions

diff --git a/include/config.h b/include/config.h
index 038cf992..a08bc4f7 100644
--- a/include/config.h
+++ b/include/config.h
@@ -214,9 +214,8 @@
 #define ALLPOST "ALLPOST"
 
 #define MAXTAGS	256
-#define BRC_STRLEN 15             /* Length of board name */
+#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
 
 #define WRAPMARGIN (511)
diff --git a/include/proto.h b/include/proto.h
index 9851a9e0..46eab16c 100644
--- a/include/proto.h
+++ b/include/proto.h
@@ -74,10 +74,6 @@ int board_digest();
 
 /* board */
 #define setutmpbid(bid) currutmp->brc_id=bid;
-int brc_unread(const char *fname, int bnum, const int *blist);
-int brc_initial_board(const char *boardname);
-void brc_update();
-void brc_finalize();
 int HasPerm(boardheader_t *bptr);
 int New();
 int Boards();
@@ -89,12 +85,24 @@ int validboard(int bid);
 void sigfree(int);
 #endif
 
+/* brc */
+int brc_initialize();
+void brc_finalize();
+int brc_unread(const char *fname, int bnum, const time_t *blist);
+int brc_unread_time(time_t ftime, int bnum, const time_t *blist);
+int brc_initial_board(const char *boardname);
+void brc_update();
+int brc_read_record(int bid, int *num, time_t *list);
+time_t * brc_find_record(int bid, int *num);
+void brc_trunc(int bid, time_t ftime);
+void brc_addlist(const char* fname);
+
 /* cache */
 int moneyof(int uid);
 int getuser(char *userid);
 void setuserid(int num, char *userid);
 int searchuser(char *userid);
-int getbnum(char *bname);
+int getbnum(const char *bname);
 void reset_board(int bid);
 void touch_boards();
 void addbrd_touchcache();
@@ -105,7 +113,6 @@ boardheader_t *getbcache(int bid);
 int apply_boards(int (*func)(boardheader_t *));
 int haspostperm(char *bname);
 void inbtotal(int bid, int add);
-void brc_addlist(const char *fname);
 void setbtotal(int bid);
 unsigned int safe_sleep(unsigned int seconds);
 int apply_ulist(int (*fptr)(userinfo_t *));
diff --git a/mbbsd/Makefile b/mbbsd/Makefile
index 7c3b6996..1a078380 100644
--- a/mbbsd/Makefile
+++ b/mbbsd/Makefile
@@ -12,7 +12,7 @@ OBJS=	admin.o announce.o args.o assess.o bbs.o board.o cache.o cal.o card.o\
 	chat.o chc.o chicken.o convert.o dark.o edit.o fav.o friend.o gamble.o\
 	gomo.o guess.o indict.o io.o kaede.o lovepaper.o mail.o mbbsd.o menu.o\
 	more.o name.o osdep.o othello.o page.o read.o record.o\
-	register.o screen.o stuff.o talk.o term.o topsong.o user.o\
+	register.o screen.o stuff.o talk.o term.o topsong.o user.o brc.o\
 	vice.o vote.o xyz.o voteboard.o syspost.o var.o passwd.o calendar.o
 
 .SUFFIXES: .c .o
diff --git a/mbbsd/board.c b/mbbsd/board.c
index 200376eb..446f1103 100644
--- a/mbbsd/board.c
+++ b/mbbsd/board.c
@@ -1,298 +1,5 @@
 /* $Id$ */
 #include "bbs.h"
-#define BRC_STRLEN 15		/* Length of board name */
-#define BRC_MAXSIZE     24576   /* Effective size of brc rc file */
-#define BRC_ITEMSIZE    (BRC_STRLEN + 1 + BRC_MAXNUM * sizeof( int ))
-    /* Maximum size of each record */
-#define BRC_MAXNUM      80      /* Upper bound of brc_num, size of brc_list  */
-
-/* brc rc file form:
- * board_name     15 bytes
- * brc_num         1 byte, binary integer
- * brc_list       brc_num * sizeof(int) bytes, brc_num binary integer(s) */
-
-static time_t   brc_expire_time;
- /* Will be set to the time one year before login. All the files created
-  * before then will be recognized read. */
-
-static int      brc_changed = 0;
-/* The below two will be filled by read_brc_buf() and brc_update() */
-static char    *brc_buf = NULL;
-static int      brc_size;
-
-static char * const fn_boardrc = ".boardrc";
-
-static char    *
-brc_getrecord(char *ptr, char *endp, char *name, int *pnum, int *list)
-{
-    int             num;
-    char           *tmp;
-
-    if (ptr + BRC_STRLEN + 1 > endp) return endp + 1;
-    strncpy(name, ptr, BRC_STRLEN); /* board_name */
-    ptr += BRC_STRLEN;
-    num = (*ptr++) & 0xff;          /* brc_num */
-    tmp = ptr + num * sizeof(int);  /* end of this record */
-    if (tmp <= endp){
-	if (num > BRC_MAXNUM) /* FIXME if this happens... may crash next time. */
-	    num = BRC_MAXNUM;
-	*pnum = num;
-	memcpy(list, ptr, num * sizeof(int)); /* brc_list */
-    }
-    return tmp;
-}
-
-static char    *
-brc_putrecord(char *ptr, char *endp, const char *name, int num, const int *list)
-{
-    if (num > 0 && list[0] > brc_expire_time &&
-	    ptr + BRC_STRLEN + 1 <= endp) {
-	if (num > BRC_MAXNUM)
-	    num = BRC_MAXNUM;
-
-	while (num > 1 && list[num - 1] < brc_expire_time)
-	    num--; /* not to write the times before brc_expire_time */
-
-	if( num == 0 ) return ptr;
-
-	strncpy(ptr, name, BRC_STRLEN);  /* write in board_name */
-	ptr += BRC_STRLEN;
-	*ptr++ = num;                    /* write in brc_num */
-	if (ptr + num * sizeof(int) <= endp)
-	    memcpy(ptr, list, num * sizeof(int)); /* write in brc_list */
-	ptr += num * sizeof(int);
-    }
-    return ptr;
-}
-
-static inline void
-brc_insert_record(const char* board, int num, int* list)
-{
-    char            *ptr, *endp, *tmpp = 0;
-    char            tmp_buf[BRC_ITEMSIZE];
-    char            tmp_name[BRC_STRLEN];
-    int             tmp_list[BRC_MAXNUM];
-    int             new_size, end_size, tmp_num;
-    int             found = 0;
-
-    ptr = brc_buf;
-    endp = &brc_buf[brc_size];
-    while (ptr < endp && (*ptr >= ' ' && *ptr <= 'z')) {
-	/* for each available records */
-	tmpp = brc_getrecord(ptr, endp, tmp_name, &tmp_num, tmp_list);
-
-	if ( tmpp > endp ){
-	    /* dangling, ignore the trailing data */
-	    brc_size = (int)(ptr - brc_buf);
-	    break;
-	}
-	if ( strncmp(tmp_name, board, BRC_STRLEN) == 0 ){
-	    found = 1;
-	    break;
-	}
-	ptr = tmpp;
-    }
-
-    if( ! found ){
-	/* put on the beginning */
-	ptr = brc_putrecord(tmp_buf, tmp_buf + BRC_MAXSIZE,
-		board, num, list);
-	new_size = (int)(ptr - tmp_buf);
-	if( new_size ){
-	    brc_size += new_size;
-	    if ( brc_size > BRC_MAXSIZE )
-		brc_size = BRC_MAXSIZE;
-	    memmove(brc_buf + new_size, brc_buf, brc_size);
-	    memmove(brc_buf, tmp_buf, new_size);
-	}
-    }else{
-	/* ptr points to the old current brc list.
-	 * tmpp is the end of it (exclusive).       */
-	end_size = endp - tmpp;
-	new_size = (int)(brc_putrecord(tmp_buf, tmp_buf + BRC_ITEMSIZE,
-		    board, num, list) - tmp_buf);
-	if( new_size ){
-	    brc_size += new_size - (tmpp - ptr);
-	    if ( brc_size > BRC_MAXSIZE ){
-		end_size -= brc_size - BRC_MAXSIZE;
-		brc_size = BRC_MAXSIZE;
-	    }
-	    if ( end_size > 0 && ptr + new_size != tmpp )
-		memmove(ptr + new_size, tmpp, end_size);
-	    memmove(ptr, tmp_buf, new_size);
-	}else
-	    memmove(ptr, tmpp, brc_size - (tmpp - brc_buf));
-    }
-
-    brc_changed = 0;
-}
-
-void
-brc_update(){
-    if (brc_changed && cuser->userlevel && brc_num > 0)
-	brc_insert_record(currboard, brc_num, brc_list);
-}
-
-inline static void
-read_brc_buf()
-{
-    if( brc_buf == NULL ){
-	char            dirfile[STRLEN];
-	int             fd;
-
-	brc_buf = malloc(BRC_MAXSIZE);
-	setuserfile(dirfile, fn_boardrc);
-	if ((fd = open(dirfile, O_RDONLY)) != -1) {
-	    brc_size = read(fd, brc_buf, BRC_MAXSIZE);
-	    close(fd);
-	} else {
-	    brc_size = 0;
-	}
-    }
-}
-
-void
-brc_finalize(){
-    char brcfile[STRLEN];
-    int fd;
-    brc_update();
-    setuserfile(brcfile, fn_boardrc);
-    if (brc_buf != NULL &&
-	(fd = open(brcfile, O_WRONLY | O_CREAT | O_TRUNC, 0644)) != -1) {
-	write(fd, brc_buf, brc_size);
-	close(fd);
-    }
-}
-
-void
-brc_initialize(){
-    static char done = 0;
-    if( done )
-	return;
-    done = 1;
-    brc_expire_time = login_start_time - 365 * 86400;
-    read_brc_buf();
-}
-
-int
-brc_read_record(const char* bname, int* num, int* list){
-    char            *ptr;
-    char            *endp;
-    char            tmp_name[BRC_STRLEN];
-    ptr = brc_buf;
-    endp = &brc_buf[brc_size];
-    while (ptr < endp && (*ptr >= ' ' && *ptr <= 'z')) {
-	/* for each available records */
-	ptr = brc_getrecord(ptr, endp, tmp_name, num, list);
-	if (strncmp(tmp_name, bname, BRC_STRLEN) == 0)
-	    return *num;
-    }
-    *num = list[0] = 1;
-    return 0;
-}
-
-int
-brc_initial_board(const char *boardname)
-{
-    brc_initialize();
-
-    if (strcmp(currboard, boardname) == 0) {
-	return brc_num;
-    }
-
-    brc_update(); /* write back first */
-    strlcpy(currboard, boardname, sizeof(currboard));
-    currbid = getbnum(currboard);
-    currbrdattr = bcache[currbid - 1].brdattr;
-
-    return brc_read_record(boardname, &brc_num, brc_list);
-}
-
-static void
-brc_trunc(const char* brdname, int ftime){
-    brc_insert_record(brdname, 1, &ftime);
-    if (strncmp(brdname, currboard, BRC_STRLEN) == 0){
-	brc_num = 1;
-	brc_list[0] = ftime;
-	brc_changed = 0;
-    }
-}
-
-void
-brc_addlist(const char *fname)
-{
-    int             ftime, n, i;
-
-    if (!cuser->userlevel)
-	return;
-
-    ftime = atoi(&fname[2]);
-    if (ftime <= brc_expire_time /* too old, don't do any thing  */
-	 /* || fname[0] != 'M' || fname[1] != '.' */ ) {
-	return;
-    }
-    if (brc_num <= 0) { /* uninitialized */
-	brc_list[0] = ftime;
-	brc_num = 1;
-	brc_changed = 1;
-	return;
-    }
-    if ((brc_num == 1) && (ftime < brc_list[0])) /* most when after 'v' */
-	return;
-    for (n = 0; n < brc_num; n++) { /* using linear search */
-	if (ftime == brc_list[n]) {
-	    return;
-	} else if (ftime > brc_list[n]) {
-	    if (brc_num < BRC_MAXNUM)
-		brc_num++;
-	    /* insert ftime in to brc_list */
-	    for (i = brc_num - 1; --i >= n; brc_list[i + 1] = brc_list[i]);
-	    brc_list[n] = ftime;
-	    brc_changed = 1;
-	    return;
-	}
-    }
-}
-
-static int
-brc_unread_time(time_t ftime, int bnum, const int *blist)
-{
-    int             n;
-
-    if (ftime <= brc_expire_time) /* too old */
-	return 0;
-
-    if (brc_num <= 0)
-	return 1;
-    for (n = 0; n < bnum; n++) { /* using linear search */
-	if (ftime > blist[n])
-	    return 1;
-	else if (ftime == blist[n])
-	    return 0;
-    }
-    return 0;
-}
-
-int
-brc_unread(const char *fname, int bnum, const int *blist)
-{
-    int             ftime, n;
-
-    ftime = atoi(&fname[2]); /* this will get the time of the file created */
-
-    if (ftime <= brc_expire_time) /* too old */
-	return 0;
-
-    if (brc_num <= 0)
-	return 1;
-    for (n = 0; n < bnum; n++) { /* using linear search */
-	if (ftime > blist[n])
-	    return 1;
-	else if (ftime == blist[n])
-	    return 0;
-    }
-    return 0;
-}
 
 /* personal board state
  * 相對於看板的 attr (BRD_* in ../include/pttstruct.h),
@@ -343,7 +50,8 @@ void imovefav(int old)
 void
 init_brdbuf()
 {
-    brc_initialize();
+    if (brc_initialize())
+	return;
     brc_initial_board(DEFAULT_BOARD);
     set_board();
 }
@@ -411,8 +119,9 @@ have_author(char *brdname)
 static int
 check_newpost(boardstat_t * ptr)
 {				/* Ptt 改 */
-    int             tbrc_list[BRC_MAXNUM], tbrc_num;
+    int             tbrc_num;
     time_t          ftime;
+    time_t         *tbrc_list;
 
     ptr->myattr &= ~NBRD_UNREAD;
     if (B_BH(ptr)->brdattr & BRD_GROUPBOARD)
@@ -426,8 +135,8 @@ check_newpost(boardstat_t * ptr)
     if (ftime > now)
 	ftime = B_LASTPOSTTIME(ptr) = now - 1;
 
-    if ( brc_read_record(B_BH(ptr)->brdname, &tbrc_num, tbrc_list) == 0 ||
-	 brc_unread_time(ftime, tbrc_num, tbrc_list) )
+    tbrc_list = brc_find_record(ptr->bid, &tbrc_num);
+    if ( brc_unread_time(ftime, tbrc_num, tbrc_list) )
 	ptr->myattr |= NBRD_UNREAD;
     
     return 1;
@@ -1298,10 +1007,10 @@ choose_board(int newflag)
 		break;
 	    if (ch == 'v') {
 		ptr->myattr &= ~NBRD_UNREAD;
-		brc_trunc(B_BH(ptr)->brdname, now);
+		brc_trunc(ptr->bid, now);
 		setbrdtime(ptr->bid, now);
 	    } else {
-		brc_trunc(B_BH(ptr)->brdname, 1);
+		brc_trunc(ptr->bid, 1);
 		setbrdtime(ptr->bid, 1);
 		ptr->myattr |= NBRD_UNREAD;
 	    }
diff --git a/mbbsd/brc.c b/mbbsd/brc.c
new file mode 100644
index 00000000..cb5432cc
--- /dev/null
+++ b/mbbsd/brc.c
@@ -0,0 +1,423 @@
+#include "bbs.h"
+
+#ifndef BRC_MAXNUM
+#define BRC_STRLEN      15	/* Length of board name */
+#define BRC_MAXSIZE     24576   /* Effective size of brc rc file, 8192 * 3 */
+#define BRC_MAXNUM      80      /* Upper bound of brc_num, size of brc_list  */
+#endif
+
+#define BRC_BLOCKSIZE   1024
+
+#if MAX_BOARD > 32767 || BRC_MAXSIZE > 32767
+#error Max number of boards or BRC_MAXSIZE cannot fit in unsighed short, \
+please rewrite brc.c
+#endif
+
+typedef unsigned short brcbid_t;
+typedef unsigned short brcnbrd_t;
+
+/* old brc rc file form:
+ * board_name     15 bytes
+ * brc_num         1 byte, binary integer
+ * brc_list       brc_num * sizeof(int) bytes, brc_num binary integer(s) */
+
+static time_t   brc_expire_time;
+ /* Will be set to the time one year before login. All the files created
+  * before then will be recognized read. */
+
+static int      brc_changed = 0;
+/* The below two will be filled by read_brc_buf() and brc_update() */
+static char     *brc_buf = NULL;
+static int       brc_size;
+static int       brc_alloc;
+
+static char * const fn_oldboardrc = ".boardrc";
+static char * const fn_brc = ".brc2";
+
+#if 0
+/* unused after brc2 */
+static char *
+brc_getrecord(char *ptr, char *endp, brcbid_t *bid, brcnbrd_t *pnum, time_t *list)
+{
+    brcnbrd_t num;
+    char   *tmp;
+
+    if (ptr + sizeof(brcbid_t) + sizeof(brcnbrd_t) > endp)
+	return endp + 1; /* dangling, ignoring it */
+    *bid = *(brcbid_t*)ptr;    /* bid */
+    ptr += sizeof(brcbid_t);
+    num = *(brcnbrd_t*)ptr;    /* brc_num */
+    ptr += sizeof(brcnbrd_t);
+    tmp = ptr + num * sizeof(time_t);     /* end of this record */
+    if (tmp <= endp){
+	memcpy(list, ptr, num * sizeof(time_t)); /* brc_list */
+	if (num > BRC_MAXNUM)
+	    num = BRC_MAXNUM;
+	*pnum = num;
+    }
+    return tmp;
+}
+#endif
+
+/* Returns the address of the record strictly between begin and endp with
+ * bid equal to the parameter. Returns 0 if not found.
+ * brcnbrd_t *num is an output parameter which will filled with brc_num
+ * if the record is found. If not found the record, *num will be the number
+ * of dangling bytes. */
+static char *
+brc_findrecord_in(char *begin, char *endp, brcbid_t bid, brcnbrd_t *num)
+{
+    char     *tmpp, *ptr = begin;
+    brcbid_t tbid;
+    while (ptr + sizeof(brcbid_t) + sizeof(brcnbrd_t) < endp) {
+	/* for each available records */
+	tmpp = ptr;
+	tbid = *(brcbid_t*)tmpp;
+	tmpp += sizeof(brcbid_t);
+	*num = *(brcnbrd_t*)tmpp;
+	tmpp += sizeof(brcnbrd_t) + *num * sizeof(time_t); /* end of record */
+
+	if ( tmpp > endp ){
+	    /* dangling, ignore the trailing data */
+	    *num = (brcnbrd_t)(endp - ptr); /* for brc_insert_record() */
+	    return 0;
+	}
+	if ( tbid == bid )
+	    return ptr;
+	ptr = tmpp;
+    }
+
+    *num = 0;
+    return 0;
+}
+
+time_t *
+brc_find_record(int bid, int *num)
+{
+    char *p;
+    *num = 0;
+    p = brc_findrecord_in(brc_buf, brc_buf + brc_size, bid, (brcnbrd_t*)num);
+    if (p)
+	return (time_t*)(p + sizeof(brcbid_t) + sizeof(brcnbrd_t));
+    *num = 0;
+    return 0;
+}
+
+static char *
+brc_putrecord(char *ptr, char *endp, brcbid_t bid, brcnbrd_t num, const time_t *list)
+{
+    char * tmp;
+    if (num > 0 && list[0] > brc_expire_time &&
+	    ptr + sizeof(brcbid_t) + sizeof(brcnbrd_t) <= endp) {
+	if (num > BRC_MAXNUM)
+	    num = BRC_MAXNUM;
+
+	while (num > 0 && list[num - 1] < brc_expire_time)
+	    num--; /* don't write the times before brc_expire_time */
+
+	if (num == 0) return ptr;
+
+	*(brcbid_t*)ptr  = bid;         /* write in bid */
+	ptr += sizeof(brcbid_t);
+	*(brcnbrd_t*)ptr = num;         /* write in brc_num */
+	ptr += sizeof(brcnbrd_t);
+	tmp = ptr + num * sizeof(time_t);
+	if (tmp <= endp)
+	    memcpy(ptr, list, num * sizeof(time_t)); /* write in brc_list */
+	ptr = tmp;
+    }
+    return ptr;
+}
+
+static inline int
+brc_enlarge_buf()
+{
+    char buffer[BRC_MAXSIZE - BRC_BLOCKSIZE];
+    if (brc_alloc >= BRC_MAXSIZE)
+	return 0;
+    memcpy(buffer, brc_buf, brc_alloc);
+    free(brc_buf);
+    brc_alloc += BRC_BLOCKSIZE;
+    brc_buf = (char*)malloc(brc_alloc);
+    memcpy(brc_buf, buffer, brc_alloc - BRC_BLOCKSIZE);
+    return 1;
+}
+
+static inline void
+brc_get_buf(int size){
+    if (!size)
+	brc_alloc = BRC_BLOCKSIZE;
+    else
+	brc_alloc = (size + BRC_BLOCKSIZE - 1) / BRC_BLOCKSIZE * BRC_BLOCKSIZE;
+    if (brc_alloc > BRC_MAXSIZE)
+	brc_alloc = BRC_MAXSIZE;
+    brc_buf = (char*)malloc(brc_alloc);
+}
+
+static inline void
+brc_insert_record(brcbid_t bid, brcnbrd_t num, time_t* list)
+{
+    char           *ptr;
+    int             new_size, end_size;
+    brcnbrd_t       tnum;
+
+    ptr = brc_findrecord_in(brc_buf, brc_buf + brc_size, bid, &tnum);
+
+    /* FIXME: this loop is copied from brc_putrecord() */
+    while (num > 0 && list[num - 1] < brc_expire_time)
+	num--; /* don't write the times before brc_expire_time */
+
+    if (!ptr) {
+	brc_size -= tnum;
+
+	/* put on the beginning */
+	if (num && (new_size =
+		sizeof(brcbid_t) + sizeof(brcnbrd_t) + num * sizeof(time_t))){
+	    brc_size += new_size;
+	    if (brc_size > brc_alloc && !brc_enlarge_buf())
+		brc_size = BRC_MAXSIZE;
+	    if (brc_size > new_size)
+		memmove(brc_buf + new_size, brc_buf, brc_size - new_size);
+	    brc_putrecord(brc_buf, brc_buf + new_size, bid, num, list);
+	}
+    } else {
+	/* ptr points to the old current brc list.
+	 * tmpp is the end of it (exclusive).       */
+	char *tmpp = ptr + sizeof(brcbid_t) + sizeof(brcnbrd_t)
+	    + tnum * sizeof(time_t);
+	end_size = brc_buf + brc_size - tmpp;
+	if (num) {
+	    new_size = sizeof(brcbid_t) + sizeof(brcnbrd_t)
+		+ num * sizeof(time_t);
+	    brc_size += new_size - (tmpp - ptr);
+	    if (brc_size > brc_alloc && ! brc_enlarge_buf() ) {
+		end_size -= brc_size - BRC_MAXSIZE;
+		brc_size = BRC_MAXSIZE;
+	    }
+	    if (end_size > 0 && ptr + new_size != tmpp)
+		memmove(ptr + new_size, tmpp, end_size);
+	    brc_putrecord(ptr, brc_buf + brc_alloc, bid, num, list);
+	} else { /* deleting record */
+	    memmove(ptr, tmpp, end_size);
+	    brc_size -= (tmpp - ptr);
+	}
+    }
+
+    brc_changed = 0;
+}
+
+void
+brc_update(){
+    if (brc_changed && cuser->userlevel && brc_num > 0)
+	brc_insert_record(currbid, brc_num, brc_list);
+}
+
+/* return 1 if successfully read from old .boardrc file.
+ * otherwise, return 0. */
+inline static void
+read_old_brc(int fd)
+{
+    char        brdname[BRC_STRLEN + 1];
+    char       *ptr;
+    brcnbrd_t   num;
+    brcbid_t    bid;
+    brcbid_t    read_brd[512];
+    int         nRead = 0, i;
+
+    ptr = brc_buf;
+    brc_size = 0;
+    while (read(fd, brdname, BRC_STRLEN + 1) == BRC_STRLEN + 1) {
+	num = brdname[BRC_STRLEN];
+	brdname[BRC_STRLEN] = 0;
+	bid = getbnum(brdname);
+
+	for (i = 0; i < nRead; ++i)
+	    if (read_brd[i] == bid)
+		break;
+	if (i != nRead){
+	    lseek(fd, num * sizeof(int), SEEK_CUR);
+	    continue;
+	}
+	read_brd[nRead >= 512 ? nRead = 0 : nRead++] = bid;
+
+	*(brcbid_t*)ptr = bid;
+	ptr += sizeof(brcbid_t);
+	*(brcnbrd_t*)ptr = num;
+	ptr += sizeof(brcnbrd_t);
+	if (read(fd, ptr, sizeof(int) * num) != sizeof(int) * num)
+	    break;
+
+	brc_size += sizeof(brcbid_t) + sizeof(brcnbrd_t)
+	    + sizeof(time_t) * num;
+	ptr += sizeof(time_t) * num;
+    }
+}
+
+inline static void
+read_brc_buf()
+{
+    if (brc_buf == NULL) {
+	char            brcfile[STRLEN];
+	int             fd;
+	struct stat     brcstat;
+
+	setuserfile(brcfile, fn_brc);
+	if ((fd = open(brcfile, O_RDONLY)) != -1) {
+	    fstat(fd, &brcstat);
+	    brc_get_buf(brcstat.st_size);
+	    brc_size = read(fd, brc_buf, brc_alloc);
+	    close(fd);
+	} else {
+	    setuserfile(brcfile, fn_oldboardrc);
+	    if ((fd = open(brcfile, O_RDONLY)) != -1) {
+		fstat(fd, &brcstat);
+		brc_get_buf(brcstat.st_size);
+		read_old_brc(fd);
+		close(fd);
+	    } else
+		brc_size = 0;
+	}
+    }
+}
+
+void
+brc_finalize(){
+    char brcfile[STRLEN];
+    int fd;
+    brc_update();
+    setuserfile(brcfile, fn_brc);
+    if (brc_buf != NULL &&
+	(fd = open(brcfile, O_WRONLY | O_CREAT | O_TRUNC, 0644)) != -1) {
+	write(fd, brc_buf, brc_size);
+	close(fd);
+    }
+}
+
+int
+brc_initialize(){
+    static char done = 0;
+    if (done)
+	return 1;
+    done = 1;
+    brc_expire_time = login_start_time - 365 * 86400;
+    read_brc_buf();
+    return 0;
+}
+
+int
+brc_read_record(int bid, int *num, time_t *list){
+    char *ptr;
+    *num = 0;
+    ptr = brc_findrecord_in(brc_buf, brc_buf + brc_size, bid, (brcnbrd_t*)num);
+    if ( ptr ){
+	memcpy(list, ptr + sizeof(brcbid_t) + sizeof(brcnbrd_t),
+		*num * sizeof(time_t));
+	return *num;
+    }
+    list[0] = *num = 1;
+    return 0;
+}
+
+int
+brc_initial_board(const char *boardname)
+{
+    brc_initialize();
+
+    if (strcmp(currboard, boardname) == 0) {
+	return brc_num;
+    }
+
+    brc_update(); /* write back first */
+    currbid = getbnum(boardname);
+    currboard = bcache[currbid - 1].brdname;
+    currbrdattr = bcache[currbid - 1].brdattr;
+
+    return brc_read_record(currbid, &brc_num, brc_list);
+}
+
+void
+brc_trunc(int bid, time_t ftime){
+    brc_insert_record(bid, 1, &ftime);
+    if ( bid == currbid ){
+	brc_num = 1;
+	brc_list[0] = ftime;
+	brc_changed = 0;
+    }
+}
+
+void
+brc_addlist(const char *fname)
+{
+    int             n, i;
+    time_t          ftime;
+
+    if (!cuser->userlevel)
+	return;
+
+    ftime = atoi(&fname[2]);
+    if (ftime <= brc_expire_time /* too old, don't do any thing  */
+	 /* || fname[0] != 'M' || fname[1] != '.' */ ) {
+	return;
+    }
+    if (brc_num <= 0) { /* uninitialized */
+	brc_list[0] = ftime;
+	brc_num = 1;
+	brc_changed = 1;
+	return;
+    }
+    if ((brc_num == 1) && (ftime < brc_list[0])) /* most when after 'v' */
+	return;
+    for (n = 0; n < brc_num; n++) { /* using linear search */
+	if (ftime == brc_list[n]) {
+	    return;
+	} else if (ftime > brc_list[n]) {
+	    if (brc_num < BRC_MAXNUM)
+		brc_num++;
+	    /* insert ftime into brc_list */
+	    for (i = brc_num - 1; --i >= n; brc_list[i + 1] = brc_list[i]);
+	    brc_list[n] = ftime;
+	    brc_changed = 1;
+	    return;
+	}
+    }
+}
+
+int
+brc_unread_time(time_t ftime, int bnum, const time_t *blist)
+{
+    int             n;
+
+    if (ftime <= brc_expire_time) /* too old */
+	return 0;
+
+    if (bnum <= 0)
+	return 1;
+    for (n = 0; n < bnum; n++) { /* using linear search */
+	if (ftime > blist[n])
+	    return 1;
+	else if (ftime == blist[n])
+	    return 0;
+    }
+    return 0;
+}
+
+int
+brc_unread(const char *fname, int bnum, const time_t *blist)
+{
+    int             ftime, n;
+
+    ftime = atoi(&fname[2]); /* this will get the time of the file created */
+
+    if (ftime <= brc_expire_time) /* too old */
+	return 0;
+
+    if (bnum <= 0)
+	return 1;
+    for (n = 0; n < bnum; n++) { /* using linear search */
+	if (ftime > blist[n])
+	    return 1;
+	else if (ftime == blist[n])
+	    return 0;
+    }
+    return 0;
+}
diff --git a/mbbsd/cache.c b/mbbsd/cache.c
index bac961cb..67a405d3 100644
--- a/mbbsd/cache.c
+++ b/mbbsd/cache.c
@@ -733,7 +733,7 @@ touchbpostnum(int bid, int delta)
 }
 
 int
-getbnum(char *bname)
+getbnum(const char *bname)
 {
     register int    i = 0, j, start = 0, end = SHM->Bnumber - 1;
     register boardheader_t **bhdr;
diff --git a/mbbsd/var.c b/mbbsd/var.c
index 4c7a29dc..526f5824 100644
--- a/mbbsd/var.c
+++ b/mbbsd/var.c
@@ -87,7 +87,7 @@ char            vetitle[TTLEN + 1] = "\0";
 char            currowner[IDLEN + 2] = "\0";
 char            currauthor[IDLEN + 2] = "\0";
 char            currfile[FNLEN];/* current file name @ bbs.c mail.c */
-char            currboard[IDLEN + 2];
+char           *currboard = "\0";
 char            currBM[IDLEN * 3 + 10];
 char            reset_color[4] = "\033[m";
 char            margs[64] = "\0";	/* main argv list */
@@ -361,8 +361,10 @@ userinfo_t     *currutmp;
 
 /* board.c */
 int             class_bid = 0;
+
+/* brc.c */
 int             brc_num;
-int             brc_list[BRC_MAXNUM];
+time_t          brc_list[BRC_MAXNUM];
 
 /* read.c */
 int             TagNum;			/* tag's number */
diff --git a/pttbbs.mk b/pttbbs.mk
index 3149af23..1c44aed7 100644
--- a/pttbbs.mk
+++ b/pttbbs.mk
@@ -7,7 +7,7 @@ CC?=		gcc
 CCACHE!=	which ccache|sed -e 's/^.*\///'
 PTT_CFLAGS=	-Wall -pipe -DBBSHOME='"$(BBSHOME)"' -I../include
 PTT_LDFLAGS=	-pipe -Wall -L/usr/local/lib
-PTT_LIBS=	-lcrypt -lhz -liconv
+PTT_LIBS=	-lcrypt -lhz
 
 # enable assert()
 #PTT_CFLAGS+=	-DNDEBUG 
@@ -15,7 +15,7 @@ PTT_LIBS=	-lcrypt -lhz -liconv
 # FreeBSD特有的環境
 CFLAGS_FreeBSD=	-DHAVE_SETPROCTITLE -DFreeBSD -I/usr/local/include
 LDFLAGS_FreeBSD=
-LIBS_FreeBSD=	-lkvm
+LIBS_FreeBSD=	-lkvm -liconv
 
 # Linux特有的環境
 # CFLAGS_linux=   -DHAVE_DES_CRYPT -DLinux