diff --git a/mod_log_chat/src/mod_log_chat.erl b/mod_log_chat/src/mod_log_chat.erl
index bb34a3f..4d6fd25 100644
--- a/mod_log_chat/src/mod_log_chat.erl
+++ b/mod_log_chat/src/mod_log_chat.erl
@@ -19,10 +19,8 @@
 -include_lib("xmpp/include/xmpp.hrl").
 
 -define(PROCNAME, ?MODULE).
--define(DEFAULT_PATH, ".").
--define(DEFAULT_FORMAT, text).
 
--record(config, {path=?DEFAULT_PATH, format=?DEFAULT_FORMAT}).
+-record(config, {path, format}).
 
 start(Host, Opts) ->
     ?DEBUG(" ~p  ~p~n", [Host, Opts]),
@@ -44,7 +42,12 @@ start_vhs(Host, [{_VHost, _Opts}| Tail]) ->
     ?DEBUG("start_vhs ~p  ~p~n", [Host, [{_VHost, _Opts}| Tail]]),
     start_vhs(Host, Tail).
 start_vh(Host, Opts) ->
-    Path = gen_mod:get_opt(path, Opts),
+    Path = case gen_mod:get_opt(path, Opts) of
+               auto ->
+                   filename:dirname(ejabberd_logger:get_log_path());
+               PP ->
+                   PP
+           end,
     Format = gen_mod:get_opt(format, Opts),
     ejabberd_hooks:add(user_send_packet, Host, ?MODULE, log_packet_send, 55),
     ejabberd_hooks:add(user_receive_packet, Host, ?MODULE, log_packet_receive, 55),
@@ -276,13 +279,13 @@ depends(_Host, _Opts) ->
     [].
 
 mod_opt_type(host_config) -> econf:list(econf:any());
-mod_opt_type(path) -> econf:directory(write);
+mod_opt_type(path) -> econf:either(auto, econf:directory(write));
 mod_opt_type(format) ->
     fun (A) when is_atom(A) -> A end.
 
 mod_options(_Host) ->
     [{host_config, []},
-     {path, ?DEFAULT_PATH},
-     {format, ?DEFAULT_FORMAT}].
+     {path, auto},
+     {format, text}].
 
 mod_doc() -> #{}.
diff --git a/mod_logsession/README.txt b/mod_logsession/README.txt
index 7063e17..5d9359d 100644
--- a/mod_logsession/README.txt
+++ b/mod_logsession/README.txt
@@ -21,9 +21,11 @@ Note: to log the failed authentication attempts, you need to patch ejabberd.
 	-----------------------
 
 sessionlog:
-  Define the name of log files.
-  The keyword @HOST@ will be substituted with the name of each vhost.
-  Default value: "/tmp/ejabberd_logsession_@HOST@.log"
+  Define the name of log files, or set to 'auto'.
+  The keyword @HOST@ is substituted with the name of the vhost.
+  If set to 'auto', it will store in the ejabberd log path
+  with the filename "session_@HOST@.log"
+  Default value: auto
 
 
 	EXAMPLE CONFIGURATION
diff --git a/mod_logsession/src/mod_logsession.erl b/mod_logsession/src/mod_logsession.erl
index 1214300..d0811ac 100644
--- a/mod_logsession/src/mod_logsession.erl
+++ b/mod_logsession/src/mod_logsession.erl
@@ -49,9 +49,13 @@ start(Host, Opts) ->
     ejabberd_hooks:add(forbidden_session_hook, Host, ?MODULE, forbidden, 50),
     ejabberd_hooks:add(c2s_auth_result, Host, ?MODULE, failed_auth, 50),
     ejabberd_commands:register_commands(commands()),
-    Filename1 = gen_mod:get_opt(
-		  sessionlog, 
-		  Opts),
+    Filename1 = case gen_mod:get_opt(sessionlog, Opts) of
+                    auto ->
+                        filename:join(filename:dirname(ejabberd_logger:get_log_path()),
+                                      "session_@HOST@.log");
+                    SL ->
+                        SL
+                end,
     Filename = replace_host(Host, Filename1),
     File = open_file(Filename),
     register(get_process_name(Host), spawn(?MODULE, loop, [Filename, File, Host])),
@@ -69,10 +73,10 @@ depends(_Host, _Opts) ->
     [].
 
 mod_opt_type(sessionlog) ->
-    econf:string().
+    econf:either(auto, econf:string()).
 
 mod_options(_Host) ->
-    [{sessionlog, "/tmp/ejabberd_logsession_@HOST@.log"}].
+    [{sessionlog, auto}].
 
 mod_doc() -> #{}.
 
diff --git a/mod_logxml/README.txt b/mod_logxml/README.txt
index 65adee3..d7f8c15 100644
--- a/mod_logxml/README.txt
+++ b/mod_logxml/README.txt
@@ -32,7 +32,8 @@ orientation:
     Default value: [send, revc]
 logdir: 
     Base filename, including absolute path
-    Default value: "/tmp/jabberlogs/"
+    If set to 'auto', it uses the ejabberd log path.
+    Default value: auto
 show_ip: 
     If the IP address of the local user should be logged to file.
     Default value: false
diff --git a/mod_logxml/src/mod_logxml.erl b/mod_logxml/src/mod_logxml.erl
index 5fa2694..a762425 100644
--- a/mod_logxml/src/mod_logxml.erl
+++ b/mod_logxml/src/mod_logxml.erl
@@ -24,8 +24,10 @@
 %% -------------------
 
 start(Host, Opts) ->
-    Logdir = gen_mod:get_opt(logdir, Opts),
-
+    Logdir = case gen_mod:get_opt(logdir, Opts) of
+                  auto -> filename:dirname(ejabberd_logger:get_log_path());
+                 LD -> LD
+             end,
     Rd = case gen_mod:get_opt(rotate_days, Opts) of
 	     0 -> no;
 	     Rd1 -> Rd1
@@ -278,7 +280,7 @@ mod_opt_type(direction) ->
 mod_opt_type(orientation) ->
     econf:list(econf:enum([send, recv]));
 mod_opt_type(logdir) ->
-    econf:directory();
+    econf:either(auto, econf:directory(write));
 mod_opt_type(show_ip) ->
     econf:bool();
 mod_opt_type(rotate_days) ->
@@ -294,7 +296,7 @@ mod_options(_Host) ->
     [{stanza, [iq, message, presence, other]},
      {direction, [internal, vhosts, external]},
      {orientation, [send, recv]},
-     {logdir, "/tmp/jabberlogs/"},
+     {logdir, auto},
      {show_ip, false},
      {rotate_days, 1},
      {rotate_megs, 10},
diff --git a/mod_message_log/README.txt b/mod_message_log/README.txt
index e9c55f7..0122f29 100644
--- a/mod_message_log/README.txt
+++ b/mod_message_log/README.txt
@@ -28,3 +28,7 @@ of your ejabberd.yml file:
 
   mod_message_log:
     filename: "/path/to/ejabberd-message.log"
+
+If the filename option is set to 'auto', it will be set to
+the default ejabberd log path, with the file name "message.log".
+The filename option takes as default value 'auto'.
diff --git a/mod_message_log/src/mod_message_log.erl b/mod_message_log/src/mod_message_log.erl
index a76aa62..efc6f6e 100644
--- a/mod_message_log/src/mod_message_log.erl
+++ b/mod_message_log/src/mod_message_log.erl
@@ -53,11 +53,10 @@
 
 -include_lib("xmpp/include/xmpp.hrl").
 
--define(DEFAULT_FILENAME, <<"message.log">>).
 -define(FILE_MODES, [append, raw]).
 
--record(state, {filename = ?DEFAULT_FILENAME :: binary(),
-		iodevice                     :: io:device()}).
+-record(state, {filename :: binary(),
+		iodevice :: io:device()}).
 
 -type direction() :: incoming | outgoing | offline.
 -type state() :: #state{}.
@@ -97,11 +96,11 @@ stop(Host) ->
 
 -spec mod_opt_type(atom()) -> fun((term()) -> term()).
 mod_opt_type(filename) ->
-    fun iolist_to_binary/1.
+    econf:either(auto, econf:file(write)).
 
 -spec mod_options(binary()) -> [{atom(), any()}].
 mod_options(_Host) ->
-    [{filename, ?DEFAULT_FILENAME}].
+    [{filename, auto}].
 
 -spec depends(binary(), gen_mod:opts()) -> [{module(), hard | soft}].
 depends(_Host, _Opts) ->
@@ -116,7 +115,12 @@ mod_doc() -> #{}.
 init([_Host, Opts]) ->
     process_flag(trap_exit, true),
     ejabberd_hooks:add(reopen_log_hook, ?MODULE, reopen_log, 42),
-    Filename = gen_mod:get_opt(filename, Opts),
+    Filename = case gen_mod:get_opt(filename, Opts) of
+                   auto ->
+                       filename:join(filename:dirname(ejabberd_logger:get_log_path()),
+                                     "message.log");
+                   FN -> FN
+               end,
     {ok, IoDevice} = file:open(Filename, ?FILE_MODES),
     {ok, #state{filename = Filename, iodevice = IoDevice}}.
 
diff --git a/mod_muc_log_http/README.txt b/mod_muc_log_http/README.txt
index d8b4c47..7b9684b 100644
--- a/mod_muc_log_http/README.txt
+++ b/mod_muc_log_http/README.txt
@@ -24,10 +24,10 @@ on mod_muc_log.
 
 listen:
   -
-    port: 5280
+    port: 5282
     module: ejabberd_http
     request_handlers:
-      "/pub/muclogs": mod_muc_log_http
+      /muclogs: mod_muc_log_http
 
 modules:
   mod_muc_log:
@@ -39,4 +39,4 @@ modules:
 	=====
 
 With the example options, open your web browser at:
-http://server:5280/pub/muclogs/
+http://server:5282/muclogs/
diff --git a/mod_rest/README.txt b/mod_rest/README.txt
index eed02ed..244d1dc 100644
--- a/mod_rest/README.txt
+++ b/mod_rest/README.txt
@@ -28,11 +28,11 @@ modules:
 
 To enable the HTTP request handler in the listen section:
 listen:
-  - 
+  -
     port: 5285
     module: ejabberd_http
     request_handlers:
-       "/rest": mod_rest
+       /rest: mod_rest
 
 With that configuration, you can send HTTP POST requests to the URL:
   http://localhost:5285/rest
diff --git a/mod_s2s_log/src/mod_s2s_log.erl b/mod_s2s_log/src/mod_s2s_log.erl
index 906a227..7b05cee 100644
--- a/mod_s2s_log/src/mod_s2s_log.erl
+++ b/mod_s2s_log/src/mod_s2s_log.erl
@@ -43,27 +43,25 @@
 -include("logger.hrl").
 
 -define(PROCNAME, ?MODULE).
--define(DEFAULT_FILENAME, <<"s2s.log">>).
 -define(FILE_OPTS, [append,raw]).
 
--record(config, {filename=?DEFAULT_FILENAME, iodevice}).
+-record(config, {filename, iodevice}).
 
 %% For now we only support one log file for all vhosts.
 start(Host, Opts) ->
     case whereis(?PROCNAME) of
 	undefined ->
-	    Filename = gen_mod:get_opt(filename, Opts),
-	    case filelib:ensure_dir(Filename) of
-		ok ->
+	    FilenameStr  = case gen_mod:get_opt(filename, Opts) of
+                 auto ->
+                    filename:join(filename:dirname(ejabberd_logger:get_log_path()),
+                                     "s2s.log");
+                           FN -> FN
+             end,
+            Filename = list_to_binary(FilenameStr),
 		    register(?PROCNAME,
 			     spawn(?MODULE, init, [#config{filename=Filename}])),
 		    ejabberd_hooks:add(reopen_log_hook, ?MODULE, reopen_log, 55),
 		    s2s_hooks(Host, add);
-		{error, Why} = Err ->
-		    ?ERROR_MSG("failed to create directories along the path ~s: ~s",
-			       [Filename, file:format_error(Why)]),
-		    Err
-	    end;
 	_ ->
 	    s2s_hooks(Host, add)
     end.
@@ -115,10 +113,10 @@ depends(_, _) ->
     [].
 
 mod_opt_type(filename) ->
-    fun iolist_to_binary/1.
+    econf:either(auto, econf:file(write)).
 
 mod_options(_Host) ->
-    [{filename, ?DEFAULT_FILENAME}].
+    [{filename, auto}].
 
 mod_doc() -> #{}.
 
diff --git a/mod_webpresence/src/mod_webpresence.erl b/mod_webpresence/src/mod_webpresence.erl
index 7b94d1e..ed0a47b 100644
--- a/mod_webpresence/src/mod_webpresence.erl
+++ b/mod_webpresence/src/mod_webpresence.erl
@@ -44,7 +44,6 @@
 %% Copied from ejabberd_sm.erl
 -record(session, {sid, usr, us, priority, info}).
 
--define(PIXMAPS_DIR, <<"pixmaps">>).
 -define(AUTO_ACL, webpresence_auto).
 
 %%====================================================================
@@ -54,7 +53,13 @@ start_link() ->
     gen_server:start_link({local, ?MODULE}, ?MODULE, [], []).
 
 start(Host, Opts) ->
-    Dir = gen_mod:get_opt(pixmaps_path, Opts),
+    Dir = case gen_mod:get_opt(pixmaps_path, Opts) of
+              auto ->
+                  Package = atom_to_list(?MODULE),
+                  filename:join([ext_mod:modules_dir(), Package, "priv", "pixmaps"]);
+              PP ->
+                  PP
+          end,
     catch ets:new(pixmaps_dirs, [named_table, public]),
     ets:insert(pixmaps_dirs, {directory, Dir}),
     case gen_mod:start_child(?MODULE, Host, Opts) of
@@ -77,7 +82,7 @@ mod_opt_type(host) ->
 mod_opt_type(access) ->
     econf:acl();
 mod_opt_type(pixmaps_path) ->
-    econf:directory();
+    econf:either(auto, econf:directory());
 mod_opt_type(port) ->
     econf:pos_int();
 mod_opt_type(path) ->
@@ -89,7 +94,7 @@ mod_opt_type(baseurl) ->
 mod_options(Host) ->
     [{host, <<"webpresence.", Host/binary>>},
      {access, local},
-     {pixmaps_path, ?PIXMAPS_DIR},
+     {pixmaps_path, auto},
      {port, 5280},
      {path, <<"presence">>},
      {baseurl, iolist_to_binary(io_lib:format(<<"http://~s:5280/presence/">>, [Host]))}].