Merge branch 'pan/unicode_filename_warnings'

* pan/unicode_filename_warnings:
  Add file:list_dir_all/1 and file:read_link_all/1
  prim_file: Add list_dir_all() and read_link_all()
  Teach prim_file:set_cwd() to avoid entering non-translatable directories
  Make prim_file skip invalid filenames in unicode mode
  prim_file: Refactor functions that return filenames
  prim_file: Refactor handling of responses
  prim_file: Always open non-file ports in binary mode
  Test that list_dir("non-existing-dir") fails with the correct error

10 files changed, 289 insertions, 76 deletions

diff --git a/erts/emulator/beam/atom.names b/erts/emulator/beam/atom.names
index f138324e1f..ce60bb9bbc 100644
--- a/erts/emulator/beam/atom.names
+++ b/erts/emulator/beam/atom.names
@@ -269,6 +269,7 @@ atom hipe_architecture
 atom http httph https http_response http_request http_header http_eoh http_error http_bin httph_bin
 atom id
 atom if_clause
+atom ignore
 atom imports
 atom in
 atom in_exiting
diff --git a/erts/emulator/beam/bif.tab b/erts/emulator/beam/bif.tab
index 4aaf466008..e313188901 100644
--- a/erts/emulator/beam/bif.tab
+++ b/erts/emulator/beam/bif.tab
@@ -522,6 +522,7 @@ bif erlang:nif_error/2
 bif prim_file:internal_name2native/1
 bif prim_file:internal_native2name/1
 bif prim_file:internal_normalize_utf8/1
+bif prim_file:is_translatable/1
 bif file:native_name_encoding/0
 
 #
diff --git a/erts/emulator/beam/erl_init.c b/erts/emulator/beam/erl_init.c
index 223c9c4d7e..ec3e0d54cb 100644
--- a/erts/emulator/beam/erl_init.c
+++ b/erts/emulator/beam/erl_init.c
@@ -981,19 +981,64 @@ erl_start(int argc, char **argv)
 	    break;
 	case 'f':
 	    if (!strncmp(argv[i],"-fn",3)) {
+		int warning_type =  ERL_FILENAME_WARNING_WARNING;
 		arg = get_arg(argv[i]+3, argv[i+1], &i);
 		switch (*arg) {
 		case 'u':
-		    erts_set_user_requested_filename_encoding(ERL_FILENAME_UTF8);
+		    switch (*(argv[i]+4)) {
+		    case 'w':
+		    case 0:
+			break;
+		    case 'i':
+			warning_type =  ERL_FILENAME_WARNING_IGNORE;
+			break;
+		    case 'e':
+			warning_type =  ERL_FILENAME_WARNING_ERROR;
+			break;
+		    default:
+			erts_fprintf(stderr, "bad type of warnings for "
+				     "wrongly coded filename: %s\n", argv[i]+4);
+			erts_usage();
+		    }
+		    erts_set_user_requested_filename_encoding
+			(
+			 ERL_FILENAME_UTF8,
+			 warning_type
+			 );
 		    break;
 		case 'l':
-		    erts_set_user_requested_filename_encoding(ERL_FILENAME_LATIN1);
+		    erts_set_user_requested_filename_encoding
+			(
+			 ERL_FILENAME_LATIN1,
+			 warning_type
+			 );
 		    break;
 		case 'a':
-		    erts_set_user_requested_filename_encoding(ERL_FILENAME_UNKNOWN);
+		    switch (*(argv[i]+4)) {
+		    case 'w':
+		    case 0:
+			break;
+		    case 'i':
+			warning_type =  ERL_FILENAME_WARNING_IGNORE;
+			break;
+		    case 'e':
+			warning_type =  ERL_FILENAME_WARNING_ERROR;
+			break;
+		    default:
+			erts_fprintf(stderr, "bad type of warnings for "
+				     "wrongly coded filename: %s\n", argv[i]+4);
+			erts_usage();
+		    }
+		    erts_set_user_requested_filename_encoding
+			(
+			 ERL_FILENAME_UNKNOWN,
+			 warning_type
+			 );
 		    break;
 		default:
-		    erts_fprintf(stderr, "bad filename encoding %s, can be (l,u or a)\n", arg);
+		    erts_fprintf(stderr, "bad filename encoding %s, can be "
+				 "(l,u or a, optionally followed by w, "
+				 "i or e)\n", arg);
 		    erts_usage();
 		}
 		break;
diff --git a/erts/emulator/beam/erl_unicode.c b/erts/emulator/beam/erl_unicode.c
index 99108af937..80982f3760 100644
--- a/erts/emulator/beam/erl_unicode.c
+++ b/erts/emulator/beam/erl_unicode.c
@@ -2573,8 +2573,20 @@ BIF_RETTYPE prim_file_internal_native2name_1(BIF_ALIST_1)
     case ERL_FILENAME_UTF8:
 	bytes = erts_get_aligned_binary_bytes(BIF_ARG_1, &temp_alloc);
 	if (erts_analyze_utf8(bytes,size,&err_pos,&num_chars,NULL) != ERTS_UTF8_OK) {
+	    Eterm *hp = HAlloc(BIF_P,3);
+	    Eterm warn_type = NIL;
 	    erts_free_aligned_binary_bytes(temp_alloc);
-	    goto noconvert;
+	    switch (erts_get_filename_warning_type()) {
+	    case ERL_FILENAME_WARNING_IGNORE:
+		warn_type = am_ignore;
+		break;
+	    case ERL_FILENAME_WARNING_ERROR:
+		warn_type = am_error;
+		break;
+	    default:
+		warn_type = am_warning;
+	    }
+	    BIF_RET(TUPLE2(hp,am_error,warn_type));
 	}
 	num_built = 0;
 	num_eaten = 0;
@@ -2607,9 +2619,8 @@ BIF_RETTYPE prim_file_internal_native2name_1(BIF_ALIST_1)
 	erts_free_aligned_binary_bytes(temp_alloc);
 	BIF_RET(ret);
     default:
-	goto noconvert;
+	break;
     }
- noconvert:
     BIF_RET(BIF_ARG_1);
 }
 
@@ -2646,6 +2657,52 @@ BIF_RETTYPE prim_file_internal_normalize_utf8_1(BIF_ALIST_1)
     BIF_RET(ret);
 }  
 
+BIF_RETTYPE prim_file_is_translatable_1(BIF_ALIST_1)
+{
+    ERTS_DECLARE_DUMMY(Eterm real_bin);
+    ERTS_DECLARE_DUMMY(Uint offset);
+    Uint size;
+    Uint num_chars;
+    Uint bitsize;
+    ERTS_DECLARE_DUMMY(Uint bitoffs);
+    byte *temp_alloc = NULL;
+    byte *bytes;
+    byte *err_pos;
+    int status;
+
+    if (is_not_binary(BIF_ARG_1)) {
+	BIF_ERROR(BIF_P,BADARG);
+    }
+    size = binary_size(BIF_ARG_1);
+    ERTS_GET_REAL_BIN(BIF_ARG_1, real_bin, offset, bitoffs, bitsize);
+    if (bitsize != 0) {
+	BIF_ERROR(BIF_P,BADARG);
+    }
+    if (size == 0) {
+	BIF_RET(am_true);
+    }
+
+    /*
+     * If the encoding is latin1, the pathname is always translatable.
+     */
+    switch (erts_get_native_filename_encoding()) {
+    case ERL_FILENAME_LATIN1:
+	BIF_RET(am_true);
+    case ERL_FILENAME_WIN_WCHAR:
+	if (erts_get_user_requested_filename_encoding() == ERL_FILENAME_LATIN1) {
+	    BIF_RET(am_true);
+	}
+    }
+
+    /*
+     * Check whether the binary contains legal UTF-8 sequences.
+     */
+    bytes = erts_get_aligned_binary_bytes(BIF_ARG_1, &temp_alloc);
+    status = erts_analyze_utf8(bytes, size, &err_pos, &num_chars, NULL);
+    erts_free_aligned_binary_bytes(temp_alloc);
+    BIF_RET(status == ERTS_UTF8_OK ? am_true : am_false);
+}  
+
 BIF_RETTYPE file_native_name_encoding_0(BIF_ALIST_0)
 {
     switch (erts_get_native_filename_encoding()) {
diff --git a/erts/emulator/beam/sys.h b/erts/emulator/beam/sys.h
index 249a9c05c2..9416a91480 100644
--- a/erts/emulator/beam/sys.h
+++ b/erts/emulator/beam/sys.h
@@ -1029,10 +1029,22 @@ char* win32_errorstr(int);
 #define ERL_FILENAME_UTF8_MAC  (3)
 #define ERL_FILENAME_WIN_WCHAR (4)
 
+/************************************************************************
+ * If a filename in for example list_dir is not in the right encoding, it
+ * will be skipped in the resulting list, but depending on a startup setting
+ * we will inform the user in different ways. These macros define the
+ * different reactions to wrongly coded filenames. In the error case an
+ * exception will be thrown by prim_file.
+ ************************************************************************/
+#define ERL_FILENAME_WARNING_WARNING (0)
+#define ERL_FILENAME_WARNING_IGNORE (1)
+#define ERL_FILENAME_WARNING_ERROR (2)
+
 int erts_get_native_filename_encoding(void);
 /* The set function is only to be used by erl_init! */
-void erts_set_user_requested_filename_encoding(int encoding); 
+void erts_set_user_requested_filename_encoding(int encoding, int warning);
 int erts_get_user_requested_filename_encoding(void);
+int erts_get_filename_warning_type(void);
 
 void erts_init_sys_common_misc(void);
 
diff --git a/erts/emulator/sys/common/erl_sys_common_misc.c b/erts/emulator/sys/common/erl_sys_common_misc.c
index 1bf5fa89f4..a0cd4cd10a 100644
--- a/erts/emulator/sys/common/erl_sys_common_misc.c
+++ b/erts/emulator/sys/common/erl_sys_common_misc.c
@@ -47,14 +47,16 @@
 /* Written once and only once */
 
 static int filename_encoding = ERL_FILENAME_UNKNOWN;
+static int filename_warning = ERL_FILENAME_WARNING_WARNING;
 #if defined(__WIN32__) || defined(__DARWIN__)
 static int user_filename_encoding = ERL_FILENAME_UTF8; /* Default unicode on windows */
 #else
 static int user_filename_encoding = ERL_FILENAME_LATIN1;
 #endif
-void erts_set_user_requested_filename_encoding(int encoding)
+void erts_set_user_requested_filename_encoding(int encoding, int warning)
 {
     user_filename_encoding = encoding;
+    filename_warning = warning;
 }
 
 int erts_get_user_requested_filename_encoding(void)
@@ -62,6 +64,11 @@ int erts_get_user_requested_filename_encoding(void)
     return user_filename_encoding;
 }
 
+int erts_get_filename_warning_type(void)
+{
+    return filename_warning;
+}
+
 void erts_init_sys_common_misc(void)
 {
 #if defined(__WIN32__)
diff --git a/erts/preloaded/ebin/erl_prim_loader.beam b/erts/preloaded/ebin/erl_prim_loader.beam
index f8c2df3a5a..4a3af265c1 100644
--- a/erts/preloaded/ebin/erl_prim_loader.beam
+++ b/erts/preloaded/ebin/erl_prim_loader.beam
diff --git a/erts/preloaded/ebin/prim_file.beam b/erts/preloaded/ebin/prim_file.beam
index ca93edbe25..f7b3aac376 100644
--- a/erts/preloaded/ebin/prim_file.beam
+++ b/erts/preloaded/ebin/prim_file.beam
diff --git a/erts/preloaded/src/erl_prim_loader.erl b/erts/preloaded/src/erl_prim_loader.erl
index d36fdeba3f..7490954f2d 100644
--- a/erts/preloaded/src/erl_prim_loader.erl
+++ b/erts/preloaded/src/erl_prim_loader.erl
@@ -149,8 +149,18 @@ start_it("inet", Id, Pid, Hosts) ->
 
 start_it("efile", Id, Pid, _Hosts) ->
     process_flag(trap_exit, true),
-    {ok, Port} = prim_file:open([binary]),
-    init_ack(Pid),
+    {ok, Port} = prim_file:start(),
+    %% Check that we started in a valid directory.
+    case prim_file:get_cwd(Port) of
+	{error, _} ->
+	    %% At this point in the startup, we have no error_logger at all.
+	    Report = "Invalid current directory or invalid filename "
+		"mode: loader cannot read current directory\n",
+	    erlang:display(Report),
+	    exit({error, invalid_current_directory});
+	_ ->
+	    init_ack(Pid)
+    end,
     MultiGet = case erlang:system_info(thread_pool_size) of
                    0 -> false;
                    _ -> true
@@ -434,7 +444,7 @@ efile_multi_get_file_from_port2(_MFs, 0, _Max, State, _Paths, _Fun, _Ref, Ret) -
 
 efile_par_get_file(Ref, State, {Mod,File} = MF, Paths, Pid, Fun) ->
     %% One port for each file read in "parallel":
-    case prim_file:open([binary]) of
+    case prim_file:start() of
         {ok, Port} ->
             Port0 = State#state.data,
             State1 = State#state{data = Port},
diff --git a/erts/preloaded/src/prim_file.erl b/erts/preloaded/src/prim_file.erl
index 50adf9c89d..bf8879c2a0 100644
--- a/erts/preloaded/src/prim_file.erl
+++ b/erts/preloaded/src/prim_file.erl
@@ -50,9 +50,9 @@
 	 write_file_info/2, write_file_info/3, write_file_info/4,
 	 make_link/2, make_link/3,
 	 make_symlink/2, make_symlink/3,
-	 read_link/1, read_link/2,
+	 read_link/1, read_link/2, read_link_all/1, read_link_all/2,
 	 read_link_info/1, read_link_info/2, read_link_info/3,
-	 list_dir/1, list_dir/2]).
+	 list_dir/1, list_dir/2, list_dir_all/1, list_dir_all/2]).
 %% How to start and stop the ?DRV port.
 -export([start/0, stop/1]).
 
@@ -152,16 +152,19 @@
 
 -export([internal_name2native/1,
          internal_native2name/1,
-         internal_normalize_utf8/1]).
+         internal_normalize_utf8/1,
+	 is_translatable/1]).
 
 -type prim_file_name() :: string() | unicode:unicode_binary().
+-type prim_file_name_error() :: 'error' | 'ignore' | 'warning'.
 
 -spec internal_name2native(prim_file_name()) -> binary().
 
 internal_name2native(_) ->
     erlang:nif_error(undefined).
 
--spec internal_native2name(binary()) -> prim_file_name().
+-spec internal_native2name(binary()) ->
+        prim_file_name() | {'error',prim_file_name_error()}.
 
 internal_native2name(_) ->
     erlang:nif_error(undefined).
@@ -171,6 +174,11 @@ internal_native2name(_) ->
 internal_normalize_utf8(_) ->
     erlang:nif_error(undefined).
 
+-spec is_translatable(prim_file_name()) -> boolean().
+
+is_translatable(_) ->
+    erlang:nif_error(undefined).
+
 %%% End of BIFs
 
 %%%-----------------------------------------------------------------
@@ -210,12 +218,7 @@ open(_, _) ->
 %% Opens a port that can be used for open/3 or read_file/2.
 %% Returns {ok, Port} | {error, Reason}.
 open(Portopts) when is_list(Portopts) ->
-    case drv_open(?FD_DRV, Portopts) of
-	{error, _} = Error ->
-	    Error;
-	Other ->
-	    Other
-    end;
+    drv_open(?FD_DRV, [binary|Portopts]);
 open(_) ->
     {error, badarg}.
 
@@ -607,13 +610,7 @@ sendfile(#file_descriptor{module = ?MODULE, data = {Port, _}},
 %% Returns {ok, Port}, the Port should be used as first argument in all
 %% the following functions. Returns {error, Reason} upon failure.
 start() ->
-    try erlang:open_port({spawn, ?DRV}, [binary]) of
-	Port ->
-	    {ok, Port}
-    catch
-	error:Reason ->
-	    {error, Reason}
-    end.
+    drv_open(?DRV, [binary]).
 
 stop(Port) when is_port(Port) ->
     try erlang:port_close(Port) of
@@ -667,7 +664,8 @@ get_cwd_int(Drive) ->
     get_cwd_int({?DRV, [binary]}, Drive).
 
 get_cwd_int(Port, Drive) ->
-    drv_command(Port, <<?FILE_PWD, Drive>>).
+    drv_command(Port, <<?FILE_PWD, Drive>>,
+		fun handle_fname_response/1).
 
 
 
@@ -679,10 +677,17 @@ set_cwd(Dir) ->
 set_cwd(Port, Dir) when is_port(Port) ->
     set_cwd_int(Port, Dir).
 
-set_cwd_int(Port, Dir) ->
-    %% Dir is now either a string or an EXIT tuple.
-    %% An EXIT tuple will fail in the following catch.
-    drv_command(Port, [?FILE_CHDIR, pathname(Dir)]).
+set_cwd_int(Port, Dir) when is_binary(Dir) ->
+    case prim_file:is_translatable(Dir) of
+	false ->
+	    {error, no_translation};
+	true ->
+	    drv_command(Port, [?FILE_CHDIR, pathname(Dir)])
+    end;
+set_cwd_int(Port, Dir) when is_list(Dir) ->
+    drv_command(Port, [?FILE_CHDIR, pathname(Dir)]);
+set_cwd_int(_, _) ->
+    {error, badarg}.
 
 
 
@@ -775,7 +780,8 @@ altname(Port, File) when is_port(Port) ->
     altname_int(Port, File).
 
 altname_int(Port, File) ->
-    drv_command(Port, [?FILE_ALTNAME, pathname(File)]).
+    drv_command(Port, [?FILE_ALTNAME, pathname(File)],
+		fun handle_fname_response/1).
 
 %% write_file_info/{2,3,4}
 
@@ -868,7 +874,20 @@ read_link(Port, Link) when is_port(Port) ->
     read_link_int(Port, Link).
 
 read_link_int(Port, Link) ->
-    drv_command(Port, [?FILE_READLINK, pathname(Link)]).
+    drv_command(Port, [?FILE_READLINK, pathname(Link)],
+		fun handle_fname_response/1).
+
+%% read_link_all/{2,3}
+
+read_link_all(Link) ->
+    read_link_all_int({?DRV, [binary]}, Link).
+
+read_link_all(Port, Link) when is_port(Port) ->
+    read_link_all_int(Port, Link).
+
+read_link_all_int(Port, Link) ->
+    drv_command(Port, [?FILE_READLINK, pathname(Link)],
+		fun handle_fname_response_all/1).
 
 
 
@@ -910,20 +929,112 @@ list_dir(Port, Dir) when is_port(Port) ->
     list_dir_int(Port, Dir).
 
 list_dir_int(Port, Dir) ->
-    drv_command(Port, [?FILE_READDIR, pathname(Dir)], []).
-
+    drv_command(Port, [?FILE_READDIR, pathname(Dir)],
+		fun(P) ->
+			case list_dir_response(P, []) of
+			    {ok, RawNames} ->
+				{ok, list_dir_convert(RawNames)};
+			    Error ->
+				Error
+			end
+		end).
+
+list_dir_all(Dir) ->
+    list_dir_all_int({?DRV, [binary]}, Dir).
+
+list_dir_all(Port, Dir) when is_port(Port) ->
+    list_dir_all_int(Port, Dir).
+
+list_dir_all_int(Port, Dir) ->
+    drv_command(Port, [?FILE_READDIR, pathname(Dir)],
+		fun(P) ->
+			case list_dir_response(P, []) of
+			    {ok, RawNames} ->
+				{ok, list_dir_convert_all(RawNames)};
+			    Error ->
+				Error
+			end
+		end).
+
+list_dir_response(Port, Acc0) ->
+    case drv_get_response(Port) of
+	{lfname, []} ->
+	    {ok, Acc0};
+	{lfname, Names} ->
+	    Acc = [Name || <<L:16,Name:L/binary>> <= Names] ++ Acc0,
+	    list_dir_response(Port, Acc);
+	Error ->
+	    Error
+    end.
 
+list_dir_convert([Name|Names]) ->
+    %% If the filename cannot be converted, return error or ignore
+    %% with optional error logger warning, depending on +fn{u|a}{i|e|w}
+    %% emulator switches.
+    case prim_file:internal_native2name(Name) of
+	{error, warning} ->
+	    error_logger:warning_msg("Non-unicode filename ~p ignored\n",
+				     [Name]),
+	    list_dir_convert(Names);
+	{error, ignore} ->
+	    list_dir_convert(Names);
+	{error, error} ->
+	    {error, {no_translation, Name}};
+	Converted when is_list(Converted) ->
+	    [Converted|list_dir_convert(Names)]
+    end;
+list_dir_convert([]) -> [].
+
+list_dir_convert_all([Name|Names]) ->
+    %% If the filename cannot be converted, retain the filename as
+    %% a binary.
+    case prim_file:internal_native2name(Name) of
+	{error, _} ->
+	    [Name|list_dir_convert(Names)];
+	Converted when is_list(Converted) ->
+	    [Converted|list_dir_convert(Names)]
+    end;
+list_dir_convert_all([]) -> [].
 
 %%%-----------------------------------------------------------------
 %%% Functions to communicate with the driver
 
+handle_fname_response(Port) ->
+    case drv_get_response(Port) of
+	{fname, Name} ->
+	    case prim_file:internal_native2name(Name) of
+		{error, warning} ->
+		    error_logger:warning_msg("Non-unicode filename ~p "
+					     "ignored when reading link\n",
+					     [Name]),
+		    {error, einval};
+		{error, _} ->
+		    {error, einval};
+		Converted when is_list(Converted) ->
+		    {ok, Converted}
+	    end;
+	Error ->
+	    Error
+    end.
 
+handle_fname_response_all(Port) ->
+    case drv_get_response(Port) of
+	{fname, Name} ->
+	    case prim_file:internal_native2name(Name) of
+		{error, _} ->
+		    {ok, Name};
+		Converted when is_list(Converted) ->
+		    {ok, Converted}
+	    end;
+	Error ->
+	    Error
+    end.
 
 %% Opens a driver port and converts any problems into {error, emfile}.
 %% Returns {ok, Port} when successful.
 
 drv_open(Driver, Portopts) ->
-    try erlang:open_port({spawn, Driver}, Portopts) of
+    try erlang:open_port({spawn_driver, Driver}, Portopts) of
 	Port ->
 	    {ok, Port}
     catch
@@ -1028,19 +1139,10 @@ drv_command_nt(Port, Command, R) when is_port(Port) ->
 %% Receives the response from a driver port.
 %% Returns: {ok, ListOrBinary}|{error, Reason}
 
-drv_get_response(Port, R) when is_list(R) ->
-    case drv_get_response(Port) of
-	ok ->
-	    {ok, R};
-	{ok, Name} ->
-	    drv_get_response(Port, [Name|R]);
-	{append, Names} ->
-	    drv_get_response(Port, append(Names, R));
-	Error ->
-	    Error
-    end;
-drv_get_response(Port, _) ->
-    drv_get_response(Port).
+drv_get_response(Port, undefined) ->
+    drv_get_response(Port);
+drv_get_response(Port, Fun) when is_function(Fun, 1) ->
+    Fun(Port).
 
 drv_get_response(Port) ->
     erlang:bump_reductions(100),
@@ -1060,10 +1162,6 @@ drv_get_response(Port) ->
 %%%-----------------------------------------------------------------
 %%% Utility functions.
 
-append([I | Is], R) when is_list(R) -> append(Is, [I | R]);
-append([], R) -> R.
-
-
 %% Converts a list of mode atoms into a mode word for the driver.
 %% Returns {Mode, Portopts, Setopts} where Portopts is a list of 
 %% options for erlang:open_port/2 and Setopts is a list of 
@@ -1205,18 +1303,10 @@ translate_response(?FILE_RESP_N2DATA = X, L0) when is_list(L0) ->
     end;
 translate_response(?FILE_RESP_EOF, []) ->
     eof;
-translate_response(?FILE_RESP_FNAME, []) ->
-    ok;
-translate_response(?FILE_RESP_FNAME, Data) when is_binary(Data) ->
-    {ok, prim_file:internal_native2name(Data)};
 translate_response(?FILE_RESP_FNAME, Data) ->
-    {ok, Data};
-translate_response(?FILE_RESP_LFNAME, []) ->
-    ok;
-translate_response(?FILE_RESP_LFNAME, Data) when is_binary(Data) ->
-    {append, transform_lfname(Data)};
+    {fname, Data};
 translate_response(?FILE_RESP_LFNAME, Data) ->
-    {append, transform_lfname(Data)};
+    {lfname, Data};
 translate_response(?FILE_RESP_ALL_DATA, Data) ->
     {ok, Data};
 translate_response(X, Data) ->
@@ -1332,16 +1422,6 @@ transform_ldata(0, List, [Size | Sizes], R) ->
     {Front, Rear} = lists_split(List, Size),
     transform_ldata(0, Rear, Sizes, [Front | R]).
 
-transform_lfname(<<>>) -> [];
-transform_lfname(<<L:16, Name:L/binary, Names/binary>>) -> 
-    [ prim_file:internal_native2name(Name) | transform_lfname(Names)];
-transform_lfname([]) -> [];
-transform_lfname([L1,L2|Names]) ->
-    L = (L1 bsl 8) bor L2,
-    {Name, Rest} = lists_split(Names, L),
-    [Name | transform_lfname(Rest)].
-
-
 lists_split(List, 0) when is_list(List) ->
     {[], List};
 lists_split(List, N) when is_list(List), is_integer(N), N < 0 ->