2 files changed, 12 insertions, 0 deletions
diff --git a/mbbsd/board.c b/mbbsd/board.c
index 17710bf5..10e743a3 100644
--- a/mbbsd/board.c
+++ b/mbbsd/board.c
@@ -67,6 +67,14 @@ inline boardheader_t *getparent(const boardheader_t *fh)
 	return NULL;
 }
 
+// 程式中有特別用途所以不得自行 post / 修改的看板
+int
+is_readonly_board(const char *bname)
+{
+    return (strcasecmp(bname, BN_SECURITY) == 0 ||
+	    strcasecmp(bname, BN_ALLPOST ) == 0 );
+}
+
 /**
  * @param[in]	boardname	board name, case insensitive
  * @return	0	if success
diff --git a/mbbsd/cache.c b/mbbsd/cache.c
index 3860dd1f..e56c162a 100644
--- a/mbbsd/cache.c
+++ b/mbbsd/cache.c
@@ -177,6 +177,10 @@ postperm_msg(const char *bname)
     if (!(i = getbnum(bname)))
 	return "看板不存在";
 
+    // system internal read only boards (no matter what attribute/flag set)
+    if (is_readonly_board(bname))
+	return "看板唯讀";
+
     if (HasUserPerm(PERM_SYSOP))
 	return NULL;