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-rw-r--r--lib/kernel/src/file.erl203
1 files changed, 193 insertions, 10 deletions
diff --git a/lib/kernel/src/file.erl b/lib/kernel/src/file.erl
index 5e4e1b0ba8..4028dd4f0b 100644
--- a/lib/kernel/src/file.erl
+++ b/lib/kernel/src/file.erl
@@ -28,9 +28,11 @@
%% File system and metadata.
-export([get_cwd/0, get_cwd/1, set_cwd/1, delete/1, rename/2,
make_dir/1, del_dir/1, list_dir/1,
- read_file_info/1, write_file_info/2,
+ read_file_info/1, read_file_info/2,
+ write_file_info/2, write_file_info/3,
altname/1,
- read_link_info/1, read_link/1,
+ read_link_info/1, read_link_info/2,
+ read_link/1,
make_link/2, make_symlink/2,
read_file/1, write_file/2, write_file/3]).
%% Specialized
@@ -51,6 +53,9 @@
-export([pid2name/1]).
+%% Sendfile functions
+-export([sendfile/2,sendfile/5]).
+
%%% Obsolete exported functions
-export([raw_read_file_info/1, raw_write_file_info/2]).
@@ -103,6 +108,10 @@
-type date_time() :: calendar:datetime().
-type posix_file_advise() :: 'normal' | 'sequential' | 'random'
| 'no_reuse' | 'will_need' | 'dont_need'.
+-type sendfile_option() :: {chunk_size, non_neg_integer()}.
+-type file_info_option() :: {'time', 'local'} | {'time', 'universal'}
+ | {'time', 'posix'}.
+
%%%-----------------------------------------------------------------
%%% General functions
@@ -211,6 +220,15 @@ del_dir(Name) ->
read_file_info(Name) ->
check_and_call(read_file_info, [file_name(Name)]).
+-spec read_file_info(Filename, Opts) -> {ok, FileInfo} | {error, Reason} when
+ Filename :: name(),
+ Opts :: [file_info_option()],
+ FileInfo :: file_info(),
+ Reason :: posix() | badarg.
+
+read_file_info(Name, Opts) when is_list(Opts) ->
+ check_and_call(read_file_info, [file_name(Name), Opts]).
+
-spec altname(Name :: name()) -> any().
altname(Name) ->
@@ -224,6 +242,16 @@ altname(Name) ->
read_link_info(Name) ->
check_and_call(read_link_info, [file_name(Name)]).
+-spec read_link_info(Name, Opts) -> {ok, FileInfo} | {error, Reason} when
+ Name :: name(),
+ Opts :: [file_info_option()],
+ FileInfo :: file_info(),
+ Reason :: posix() | badarg.
+
+read_link_info(Name, Opts) when is_list(Opts) ->
+ check_and_call(read_link_info, [file_name(Name),Opts]).
+
+
-spec read_link(Name) -> {ok, Filename} | {error, Reason} when
Name :: name(),
Filename :: filename(),
@@ -240,6 +268,15 @@ read_link(Name) ->
write_file_info(Name, Info = #file_info{}) ->
check_and_call(write_file_info, [file_name(Name), Info]).
+-spec write_file_info(Filename, FileInfo, Opts) -> ok | {error, Reason} when
+ Filename :: name(),
+ Opts :: [file_info_option()],
+ FileInfo :: file_info(),
+ Reason :: posix() | badarg.
+
+write_file_info(Name, Info = #file_info{}, Opts) when is_list(Opts) ->
+ check_and_call(write_file_info, [file_name(Name), Info, Opts]).
+
-spec list_dir(Dir) -> {ok, Filenames} | {error, Reason} when
Dir :: name(),
Filenames :: [filename()],
@@ -264,9 +301,9 @@ read_file(Name) ->
make_link(Old, New) ->
check_and_call(make_link, [file_name(Old), file_name(New)]).
--spec make_symlink(Name1, Name2) -> ok | {error, Reason} when
- Name1 :: name(),
- Name2 :: name(),
+-spec make_symlink(Existing, New) -> ok | {error, Reason} when
+ Existing :: name(),
+ New :: name(),
Reason :: posix() | badarg.
make_symlink(Old, New) ->
@@ -1100,8 +1137,9 @@ change_group(Name, GroupId)
Mtime :: date_time(),
Reason :: posix() | badarg.
-change_time(Name, Time)
- when is_tuple(Time) ->
+change_time(Name, {{Y, M, D}, {H, Min, Sec}}=Time)
+ when is_integer(Y), is_integer(M), is_integer(D),
+ is_integer(H), is_integer(Min), is_integer(Sec)->
write_file_info(Name, #file_info{mtime=Time}).
-spec change_time(Filename, Atime, Mtime) -> ok | {error, Reason} when
@@ -1110,10 +1148,150 @@ change_time(Name, Time)
Mtime :: date_time(),
Reason :: posix() | badarg.
-change_time(Name, Atime, Mtime)
- when is_tuple(Atime), is_tuple(Mtime) ->
+change_time(Name, {{AY, AM, AD}, {AH, AMin, ASec}}=Atime,
+ {{MY, MM, MD}, {MH, MMin, MSec}}=Mtime)
+ when is_integer(AY), is_integer(AM), is_integer(AD),
+ is_integer(AH), is_integer(AMin), is_integer(ASec),
+ is_integer(MY), is_integer(MM), is_integer(MD),
+ is_integer(MH), is_integer(MMin), is_integer(MSec)->
write_file_info(Name, #file_info{atime=Atime, mtime=Mtime}).
+%%
+%% Send data using sendfile
+%%
+
+-define(MAX_CHUNK_SIZE, (1 bsl 20)*20). %% 20 MB, has to fit in primary memory
+
+-spec sendfile(RawFile, Socket, Offset, Bytes, Opts) ->
+ {'ok', non_neg_integer()} | {'error', inet:posix() |
+ closed | badarg | not_owner} when
+ RawFile :: file:fd(),
+ Socket :: inet:socket(),
+ Offset :: non_neg_integer(),
+ Bytes :: non_neg_integer(),
+ Opts :: [sendfile_option()].
+sendfile(File, _Sock, _Offet, _Bytes, _Opts) when is_pid(File) ->
+ {error, badarg};
+sendfile(File, Sock, Offset, Bytes, []) ->
+ sendfile(File, Sock, Offset, Bytes, ?MAX_CHUNK_SIZE, [], [],
+ false, false, false);
+sendfile(File, Sock, Offset, Bytes, Opts) ->
+ ChunkSize0 = proplists:get_value(chunk_size, Opts, ?MAX_CHUNK_SIZE),
+ ChunkSize = if ChunkSize0 > ?MAX_CHUNK_SIZE ->
+ ?MAX_CHUNK_SIZE;
+ true -> ChunkSize0
+ end,
+ %% Support for headers, trailers and options has been removed because the
+ %% Darwin and BSD API for using it does not play nice with
+ %% non-blocking sockets. See unix_efile.c for more info.
+ sendfile(File, Sock, Offset, Bytes, ChunkSize, [], [],
+ false,false,false).
+
+%% sendfile/2
+-spec sendfile(Filename, Socket) ->
+ {'ok', non_neg_integer()} | {'error', inet:posix() |
+ closed | badarg | not_owner}
+ when Filename :: file:name(),
+ Socket :: inet:socket().
+sendfile(Filename, Sock) ->
+ case file:open(Filename, [read, raw, binary]) of
+ {error, Reason} ->
+ {error, Reason};
+ {ok, Fd} ->
+ Res = sendfile(Fd, Sock, 0, 0, []),
+ file:close(Fd),
+ Res
+ end.
+
+%% Internal sendfile functions
+sendfile(#file_descriptor{ module = Mod } = Fd, Sock, Offset, Bytes,
+ ChunkSize, Headers, Trailers, Nodiskio, MNowait, Sync)
+ when is_port(Sock) ->
+ case Mod:sendfile(Fd, Sock, Offset, Bytes, ChunkSize, Headers, Trailers,
+ Nodiskio, MNowait, Sync) of
+ {error, enotsup} ->
+ sendfile_fallback(Fd, Sock, Offset, Bytes, ChunkSize,
+ Headers, Trailers);
+ Else ->
+ Else
+ end;
+sendfile(_,_,_,_,_,_,_,_,_,_) ->
+ {error, badarg}.
+
+%%%
+%% Sendfile Fallback
+%%%
+sendfile_fallback(File, Sock, Offset, Bytes, ChunkSize,
+ Headers, Trailers)
+ when Headers == []; is_integer(Headers) ->
+ case sendfile_fallback(File, Sock, Offset, Bytes, ChunkSize) of
+ {ok, BytesSent} when is_list(Trailers),
+ Trailers =/= [],
+ is_integer(Headers) ->
+ sendfile_send(Sock, Trailers, BytesSent+Headers);
+ {ok, BytesSent} when is_list(Trailers), Trailers =/= [] ->
+ sendfile_send(Sock, Trailers, BytesSent);
+ {ok, BytesSent} when is_integer(Headers) ->
+ {ok, BytesSent + Headers};
+ Else ->
+ Else
+ end;
+sendfile_fallback(File, Sock, Offset, Bytes, ChunkSize, Headers, Trailers) ->
+ case sendfile_send(Sock, Headers, 0) of
+ {ok, BytesSent} ->
+ sendfile_fallback(File, Sock, Offset, Bytes, ChunkSize, BytesSent,
+ Trailers);
+ Else ->
+ Else
+ end.
+
+
+sendfile_fallback(File, Sock, Offset, Bytes, ChunkSize) ->
+ {ok, CurrPos} = file:position(File, {cur, 0}),
+ {ok, _NewPos} = file:position(File, {bof, Offset}),
+ Res = sendfile_fallback_int(File, Sock, Bytes, ChunkSize, 0),
+ file:position(File, {bof, CurrPos}),
+ Res.
+
+
+sendfile_fallback_int(File, Sock, Bytes, ChunkSize, BytesSent)
+ when Bytes > BytesSent; Bytes == 0 ->
+ Size = if Bytes == 0 ->
+ ChunkSize;
+ (Bytes - BytesSent + ChunkSize) > 0 ->
+ Bytes - BytesSent;
+ true ->
+ ChunkSize
+ end,
+ case file:read(File, Size) of
+ {ok, Data} ->
+ case sendfile_send(Sock, Data, BytesSent) of
+ {ok,NewBytesSent} ->
+ sendfile_fallback_int(
+ File, Sock, Bytes, ChunkSize,
+ NewBytesSent);
+ Error ->
+ Error
+ end;
+ eof ->
+ {ok, BytesSent};
+ Error ->
+ Error
+ end;
+sendfile_fallback_int(_File, _Sock, BytesSent, _ChunkSize, BytesSent) ->
+ {ok, BytesSent}.
+
+sendfile_send(Sock, Data, Old) ->
+ Len = iolist_size(Data),
+ case gen_tcp:send(Sock, Data) of
+ ok ->
+ {ok, Len+Old};
+ Else ->
+ Else
+ end.
+
+
+
%%%-----------------------------------------------------------------
%%% Helpers
@@ -1163,7 +1341,7 @@ path_open_first([Path|Rest], Name, Mode, LastError) ->
{error, _} = Error ->
Error;
FilePath ->
- FileName = filename:join(FilePath, Name),
+ FileName = fname_join(FilePath, Name),
case open(FileName, Mode) of
{ok, Fd} ->
{ok, Fd, FileName};
@@ -1176,6 +1354,11 @@ path_open_first([Path|Rest], Name, Mode, LastError) ->
path_open_first([], _Name, _Mode, LastError) ->
{error, LastError}.
+fname_join(".", Name) ->
+ Name;
+fname_join(Dir, Name) ->
+ filename:join(Dir, Name).
+
%%%-----------------------------------------------------------------
%%% Utility functions.
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-04 01:48:32 +0000