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    lua file system mkdir issue

    louislouis Member
    edited September 2012 in Game & application design
    I try to create a folder use lfs in app,but the new folder not exist in system...
    my test code
    require "lfs"
 
lfs.mkdir("|D|cache/test")
print(result,err)
    out:
    nil No such file or directory

    lfs.c
    static int make_dir (lua_State *L) {
	const char *path = luaL_checkstring (L, 1);
	int fail;
#ifdef _WIN32
	fail = _mkdir (gpath_transform(path));
#else
	fail =  mkdir (gpath_transform(path), S_IRUSR | S_IWUSR | S_IXUSR | S_IRGRP |
	                                      S_IWGRP | S_IXGRP | S_IROTH | S_IXOTH );
#endif
	if (fail) {
		lua_pushnil (L);
        lua_pushfstring (L, "%s", strerror(errno));
		return 2;
	}
	lua_pushboolean (L, 1);
	return 1;
}
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    Comments

    • louislouis Member
      OK,I got it.....
      require "lfs"
 
lfs.mkdir("|D|cache")
print(result,err)
      This is OK.
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    • techdojotechdojo Guru
      Accepted Answer
      I haven't used lfs but does the "cache" folder exist first, are you trying to create two folders at once - do you have create each branch of the tree separately?
      WhiteTree Games - Home, home on the web, where the bits and bytes they do play!
      #MakeABetterGame! "Never give up, Never NEVER give up!" - Winston Churchill
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    • louislouis Member
      are you trying to create two folders at once Yes.
      do you have create each branch of the tree separately? No.

      I found this problem,so I separate directory and mkdir folder hierarchy.
      require "lfs"
function saveDataToFile(dir,filename,data)
	local iter, dir_obj = pcall(lfs.dir,dir)
	if iter==false then
		local dir_split=str_split(dir,"/")
		local new_folder=nil
		for i=1,table.getn(dir_split) do
			local v=dir_split[i]
			if new_folder==nil then
				new_folder=v
			else
				new_folder=new_folder.."/"..v
			end
			local mkdir_result,mkdir_err=pcall(lfs.mkdir,new_folder)
		end
	end
	local out,err = io.open(dir..filename, "wb")
	if out then
		print("SUCC:save data to local file:"..dir..filename)
		out:write(data)
		out:close()
	else
		print("FAIL:save data to local file error:"..err)
	end
end
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