mirror of
https://github.com/processone/ejabberd.git
synced 2024-11-26 16:26:24 +01:00
beb3a450f0
Debug can be enabled with the command "ejabberd_loglevel:set(5)". (EJAB-74) * src/ejabberd_app.erl: Likewise. * src/ejabberd.hrl: Likewise (More log levels are now supported). * src/ram_file_io_server.erl: Likewise (Needed to dynamically recompile the error logger). SVN Revision: 689
409 lines
12 KiB
Erlang
409 lines
12 KiB
Erlang
%% ``The contents of this file are subject to the Erlang Public License,
|
|
%% Version 1.1, (the "License"); you may not use this file except in
|
|
%% compliance with the License. You should have received a copy of the
|
|
%% Erlang Public License along with this software. If not, it can be
|
|
%% retrieved via the world wide web at http://www.erlang.org/.
|
|
%%
|
|
%% Software distributed under the License is distributed on an "AS IS"
|
|
%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
|
|
%% the License for the specific language governing rights and limitations
|
|
%% under the License.
|
|
%%
|
|
%% The Initial Developer of the Original Code is Ericsson Utvecklings AB.
|
|
%% Portions created by Ericsson are Copyright 1999, Ericsson Utvecklings
|
|
%% AB. All Rights Reserved.''
|
|
%%
|
|
%% $Id$
|
|
%%
|
|
%% This file is mostly copied from Erlang file_io_server.erl
|
|
%% See: http://www.erlang.org/ml-archive/erlang-questions/200607/msg00080.html
|
|
%% for details on ram_file_io_server.erl (Erlang OTP R11B-2)
|
|
-module(ram_file_io_server).
|
|
|
|
%% A simple file server for io to one file instance per server instance.
|
|
|
|
-export([format_error/1]).
|
|
-export([start/3, start_link/3]).
|
|
|
|
-record(state, {handle,owner,mref,buf,read_mode}).
|
|
|
|
-define(PRIM_FILE, ram_file).
|
|
-define(READ_SIZE_LIST, 128).
|
|
-define(READ_SIZE_BINARY, (8*1024)).
|
|
|
|
-define(eat_message(M, T), receive M -> M after T -> timeout end).
|
|
|
|
%%%-----------------------------------------------------------------
|
|
%%% Exported functions
|
|
|
|
format_error({_Line, ?MODULE, Reason}) ->
|
|
io_lib:format("~w", [Reason]);
|
|
format_error({_Line, Mod, Reason}) ->
|
|
Mod:format_error(Reason);
|
|
format_error(ErrorId) ->
|
|
erl_posix_msg:message(ErrorId).
|
|
|
|
start(Owner, FileName, ModeList)
|
|
when pid(Owner), list(FileName), list(ModeList) ->
|
|
do_start(spawn, Owner, FileName, ModeList).
|
|
|
|
start_link(Owner, FileName, ModeList)
|
|
when pid(Owner), list(FileName), list(ModeList) ->
|
|
do_start(spawn_link, Owner, FileName, ModeList).
|
|
|
|
%%%-----------------------------------------------------------------
|
|
%%% Server starter, dispatcher and helpers
|
|
|
|
do_start(Spawn, Owner, FileName, ModeList) ->
|
|
Self = self(),
|
|
Ref = make_ref(),
|
|
Pid =
|
|
erlang:Spawn(
|
|
fun() ->
|
|
%% process_flag(trap_exit, true),
|
|
{ReadMode,Opts} =
|
|
case lists:member(binary, ModeList) of
|
|
true ->
|
|
{binary,ModeList};
|
|
false ->
|
|
{list,[binary|ModeList]}
|
|
end,
|
|
case ?PRIM_FILE:open(FileName, Opts) of
|
|
{error, Reason} = Error ->
|
|
Self ! {Ref, Error},
|
|
exit(Reason);
|
|
{ok, Handle} ->
|
|
%% XXX must I handle R6 nodes here?
|
|
M = erlang:monitor(process, Owner),
|
|
Self ! {Ref, ok},
|
|
server_loop(
|
|
#state{handle = Handle,
|
|
owner = Owner,
|
|
mref = M,
|
|
buf = <<>>,
|
|
read_mode = ReadMode})
|
|
end
|
|
end),
|
|
Mref = erlang:monitor(process, Pid),
|
|
receive
|
|
{Ref, {error, _Reason} = Error} ->
|
|
erlang:demonitor(Mref),
|
|
receive {'DOWN', Mref, _, _, _} -> ok after 0 -> ok end,
|
|
Error;
|
|
{Ref, ok} ->
|
|
erlang:demonitor(Mref),
|
|
receive
|
|
{'DOWN', Mref, _, _, Reason} ->
|
|
{error, Reason}
|
|
after 0 ->
|
|
{ok, Pid}
|
|
end;
|
|
{'DOWN', Mref, _, _, Reason} ->
|
|
{error, Reason}
|
|
end.
|
|
|
|
server_loop(#state{mref = Mref} = State) ->
|
|
receive
|
|
{file_request, From, ReplyAs, Request} when pid(From) ->
|
|
case file_request(Request, State) of
|
|
{reply, Reply, NewState} ->
|
|
file_reply(From, ReplyAs, Reply),
|
|
server_loop(NewState);
|
|
{error, Reply, NewState} ->
|
|
%% error is the same as reply, except that
|
|
%% it breaks the io_request_loop further down
|
|
file_reply(From, ReplyAs, Reply),
|
|
server_loop(NewState);
|
|
{stop, Reason, Reply, _NewState} ->
|
|
file_reply(From, ReplyAs, Reply),
|
|
exit(Reason)
|
|
end;
|
|
{io_request, From, ReplyAs, Request} when pid(From) ->
|
|
case io_request(Request, State) of
|
|
{reply, Reply, NewState} ->
|
|
io_reply(From, ReplyAs, Reply),
|
|
server_loop(NewState);
|
|
{error, Reply, NewState} ->
|
|
%% error is the same as reply, except that
|
|
%% it breaks the io_request_loop further down
|
|
io_reply(From, ReplyAs, Reply),
|
|
server_loop(NewState);
|
|
{stop, Reason, Reply, _NewState} ->
|
|
io_reply(From, ReplyAs, Reply),
|
|
exit(Reason)
|
|
end;
|
|
{'DOWN', Mref, _, _, Reason} ->
|
|
exit(Reason);
|
|
_ ->
|
|
server_loop(State)
|
|
end.
|
|
|
|
file_reply(From, ReplyAs, Reply) ->
|
|
From ! {file_reply, ReplyAs, Reply}.
|
|
|
|
io_reply(From, ReplyAs, Reply) ->
|
|
From ! {io_reply, ReplyAs, Reply}.
|
|
|
|
%%%-----------------------------------------------------------------
|
|
%%% file requests
|
|
|
|
file_request({pread,At,Sz},
|
|
#state{handle=Handle,buf=Buf,read_mode=ReadMode}=State) ->
|
|
case position(Handle, At, Buf) of
|
|
{ok,_Offs} ->
|
|
case ?PRIM_FILE:read(Handle, Sz) of
|
|
{ok,Bin} when ReadMode==list ->
|
|
std_reply({ok,binary_to_list(Bin)}, State);
|
|
Reply ->
|
|
std_reply(Reply, State)
|
|
end;
|
|
Reply ->
|
|
std_reply(Reply, State)
|
|
end;
|
|
file_request({pwrite,At,Data},
|
|
#state{handle=Handle,buf=Buf}=State) ->
|
|
case position(Handle, At, Buf) of
|
|
{ok,_Offs} ->
|
|
std_reply(?PRIM_FILE:write(Handle, Data), State);
|
|
Reply ->
|
|
std_reply(Reply, State)
|
|
end;
|
|
file_request(sync,
|
|
#state{handle=Handle}=State) ->
|
|
case ?PRIM_FILE:sync(Handle) of
|
|
{error,_}=Reply ->
|
|
{stop,normal,Reply,State};
|
|
Reply ->
|
|
{reply,Reply,State}
|
|
end;
|
|
file_request(close,
|
|
#state{handle=Handle}=State) ->
|
|
{stop,normal,?PRIM_FILE:close(Handle),State#state{buf= <<>>}};
|
|
file_request({position,At},
|
|
#state{handle=Handle,buf=Buf}=State) ->
|
|
std_reply(position(Handle, At, Buf), State);
|
|
file_request(truncate,
|
|
#state{handle=Handle}=State) ->
|
|
case ?PRIM_FILE:truncate(Handle) of
|
|
{error,_Reason}=Reply ->
|
|
{stop,normal,Reply,State#state{buf= <<>>}};
|
|
Reply ->
|
|
{reply,Reply,State}
|
|
end;
|
|
file_request(Unknown,
|
|
#state{}=State) ->
|
|
Reason = {request, Unknown},
|
|
{error,{error,Reason},State}.
|
|
|
|
std_reply({error,_}=Reply, State) ->
|
|
{error,Reply,State#state{buf= <<>>}};
|
|
std_reply(Reply, State) ->
|
|
{reply,Reply,State#state{buf= <<>>}}.
|
|
|
|
%%%-----------------------------------------------------------------
|
|
%%% I/O request
|
|
|
|
io_request({put_chars,Chars}, % binary(Chars) new in R9C
|
|
#state{buf= <<>>}=State) ->
|
|
put_chars(Chars, State);
|
|
io_request({put_chars,Chars}, % binary(Chars) new in R9C
|
|
#state{handle=Handle,buf=Buf}=State) ->
|
|
case position(Handle, cur, Buf) of
|
|
{error,_}=Reply ->
|
|
{stop,normal,Reply,State#state{buf= <<>>}};
|
|
_ ->
|
|
put_chars(Chars, State#state{buf= <<>>})
|
|
end;
|
|
io_request({put_chars,Mod,Func,Args},
|
|
#state{}=State) ->
|
|
case catch apply(Mod, Func, Args) of
|
|
Chars when list(Chars); binary(Chars) ->
|
|
io_request({put_chars,Chars}, State);
|
|
_ ->
|
|
{error,{error,Func},State}
|
|
end;
|
|
io_request({get_until,_Prompt,Mod,Func,XtraArgs},
|
|
#state{}=State) ->
|
|
get_chars(io_lib, get_until, {Mod, Func, XtraArgs}, State);
|
|
io_request({get_chars,_Prompt,N}, % New in R9C
|
|
#state{}=State) ->
|
|
get_chars(N, State);
|
|
io_request({get_chars,_Prompt,Mod,Func,XtraArg}, % New in R9C
|
|
#state{}=State) ->
|
|
get_chars(Mod, Func, XtraArg, State);
|
|
io_request({get_line,_Prompt}, % New in R9C
|
|
#state{}=State) ->
|
|
get_chars(io_lib, collect_line, [], State);
|
|
io_request({setopts, Opts}, % New in R9C
|
|
#state{}=State) when list(Opts) ->
|
|
setopts(Opts, State);
|
|
io_request({requests,Requests},
|
|
#state{}=State) when list(Requests) ->
|
|
io_request_loop(Requests, {reply,ok,State});
|
|
io_request(Unknown,
|
|
#state{}=State) ->
|
|
Reason = {request,Unknown},
|
|
{error,{error,Reason},State}.
|
|
|
|
|
|
|
|
%% Process a list of requests as long as the results are ok.
|
|
|
|
io_request_loop([], Result) ->
|
|
Result;
|
|
io_request_loop([_Request|_Tail],
|
|
{stop,_Reason,_Reply,_State}=Result) ->
|
|
Result;
|
|
io_request_loop([_Request|_Tail],
|
|
{error,_Reply,_State}=Result) ->
|
|
Result;
|
|
io_request_loop([Request|Tail],
|
|
{reply,_Reply,State}) ->
|
|
io_request_loop(Tail, io_request(Request, State)).
|
|
|
|
|
|
|
|
%% I/O request put_chars
|
|
%%
|
|
put_chars(Chars, #state{handle=Handle}=State) ->
|
|
case ?PRIM_FILE:write(Handle, Chars) of
|
|
{error,_}=Reply ->
|
|
{stop,normal,Reply,State};
|
|
Reply ->
|
|
{reply,Reply,State}
|
|
end.
|
|
|
|
|
|
%% Process the I/O request get_chars
|
|
%%
|
|
get_chars(0, #state{read_mode=ReadMode}=State) ->
|
|
{reply,cast(<<>>, ReadMode),State};
|
|
get_chars(N, #state{buf=Buf,read_mode=ReadMode}=State)
|
|
when integer(N), N > 0, N =< size(Buf) ->
|
|
{B1,B2} = split_binary(Buf, N),
|
|
{reply,cast(B1, ReadMode),State#state{buf=B2}};
|
|
get_chars(N, #state{handle=Handle,buf=Buf,read_mode=ReadMode}=State)
|
|
when integer(N), N > 0 ->
|
|
BufSize = size(Buf),
|
|
NeedSize = N-BufSize,
|
|
Size = max(NeedSize, ?READ_SIZE_BINARY),
|
|
case ?PRIM_FILE:read(Handle, Size) of
|
|
{ok, B} ->
|
|
if BufSize+size(B) < N ->
|
|
std_reply(cat(Buf, B, ReadMode), State);
|
|
true ->
|
|
{B1,B2} = split_binary(B, NeedSize),
|
|
{reply,cat(Buf, B1, ReadMode),State#state{buf=B2}}
|
|
end;
|
|
eof when BufSize==0 ->
|
|
{reply,eof,State};
|
|
eof ->
|
|
std_reply(cast(Buf, ReadMode), State);
|
|
{error,Reason}=Error ->
|
|
{stop,Reason,Error,State#state{buf= <<>>}}
|
|
end;
|
|
get_chars(_N, #state{}=State) ->
|
|
{error,{error,get_chars},State}.
|
|
|
|
get_chars(Mod, Func, XtraArg, #state{buf= <<>>}=State) ->
|
|
get_chars_empty(Mod, Func, XtraArg, start, State);
|
|
get_chars(Mod, Func, XtraArg, #state{buf=Buf}=State) ->
|
|
get_chars_apply(Mod, Func, XtraArg, start, State#state{buf= <<>>}, Buf).
|
|
|
|
get_chars_empty(Mod, Func, XtraArg, S,
|
|
#state{handle=Handle,read_mode=ReadMode}=State) ->
|
|
case ?PRIM_FILE:read(Handle, read_size(ReadMode)) of
|
|
{ok,Bin} ->
|
|
get_chars_apply(Mod, Func, XtraArg, S, State, Bin);
|
|
eof ->
|
|
get_chars_apply(Mod, Func, XtraArg, S, State, eof);
|
|
{error,Reason}=Error ->
|
|
{stop,Reason,Error,State}
|
|
end.
|
|
|
|
get_chars_apply(Mod, Func, XtraArg, S0,
|
|
#state{read_mode=ReadMode}=State, Data0) ->
|
|
Data1 = case ReadMode of
|
|
list when binary(Data0) -> binary_to_list(Data0);
|
|
_ -> Data0
|
|
end,
|
|
case catch Mod:Func(S0, Data1, XtraArg) of
|
|
{stop,Result,Buf} ->
|
|
{reply,Result,State#state{buf=cast_binary(Buf)}};
|
|
{'EXIT',Reason} ->
|
|
{stop,Reason,{error,err_func(Mod, Func, XtraArg)},State};
|
|
S1 ->
|
|
get_chars_empty(Mod, Func, XtraArg, S1, State)
|
|
end.
|
|
|
|
%% Convert error code to make it look as before
|
|
err_func(io_lib, get_until, {_,F,_}) ->
|
|
F;
|
|
err_func(_, F, _) ->
|
|
F.
|
|
|
|
|
|
|
|
%% Process the I/O request setopts
|
|
%%
|
|
%% setopts
|
|
setopts(Opts0, State) ->
|
|
Opts = proplists:substitute_negations([{list,binary}], Opts0),
|
|
case proplists:get_value(binary, Opts) of
|
|
true ->
|
|
{ok,ok,State#state{read_mode=binary}};
|
|
false ->
|
|
{ok,ok,State#state{read_mode=list}};
|
|
_ ->
|
|
{error,{error,badarg},State}
|
|
end.
|
|
|
|
|
|
|
|
%% Concatenate two binaries and convert the result to list or binary
|
|
cat(B1, B2, binary) ->
|
|
list_to_binary([B1,B2]);
|
|
cat(B1, B2, list) ->
|
|
binary_to_list(B1)++binary_to_list(B2).
|
|
|
|
%% Cast binary to list or binary
|
|
cast(B, binary) ->
|
|
B;
|
|
cast(B, list) ->
|
|
binary_to_list(B).
|
|
|
|
%% Convert buffer to binary
|
|
cast_binary(Binary) when binary(Binary) ->
|
|
Binary;
|
|
cast_binary(List) when list(List) ->
|
|
list_to_binary(List);
|
|
cast_binary(_EOF) ->
|
|
<<>>.
|
|
|
|
%% Read size for different read modes
|
|
read_size(binary) ->
|
|
?READ_SIZE_BINARY;
|
|
read_size(list) ->
|
|
?READ_SIZE_LIST.
|
|
|
|
max(A, B) when A >= B ->
|
|
A;
|
|
max(_, B) ->
|
|
B.
|
|
|
|
%%%-----------------------------------------------------------------
|
|
%%% ?PRIM_FILE helpers
|
|
|
|
%% Compensates ?PRIM_FILE:position/2 for the number of bytes
|
|
%% we have buffered
|
|
|
|
position(Handle, cur, Buf) ->
|
|
position(Handle, {cur, 0}, Buf);
|
|
position(Handle, {cur, Offs}, Buf) when list(Buf) ->
|
|
?PRIM_FILE:position(Handle, {cur, Offs-length(Buf)});
|
|
position(Handle, {cur, Offs}, Buf) when binary(Buf) ->
|
|
?PRIM_FILE:position(Handle, {cur, Offs-size(Buf)});
|
|
position(Handle, At, _Buf) ->
|
|
?PRIM_FILE:position(Handle, At).
|
|
|