Merge branch 'master' into sverk/hipe-line-table-bug/master/OTP-13282

20 files changed, 399 insertions, 1144 deletions

diff --git a/lib/kernel/src/code.erl b/lib/kernel/src/code.erl
index 352c02562b..ae28c97b47 100644
--- a/lib/kernel/src/code.erl
+++ b/lib/kernel/src/code.erl
@@ -68,6 +68,8 @@
 	 clash/0,
      get_mode/0]).
 
+-deprecated({rehash,0,next_major_release}).
+
 -export_type([load_error_rsn/0, load_ret/0]).
 
 -include_lib("kernel/include/file.hrl").
@@ -293,7 +295,9 @@ replace_path(Name, Dir) when (is_atom(Name) orelse is_list(Name)),
     call({replace_path,Name,Dir}).
 
 -spec rehash() -> 'ok'.
-rehash() -> call(rehash).
+rehash() ->
+    cache_warning(),
+    ok.
 
 -spec get_mode() -> 'embedded' | 'interactive'.
 get_mode() -> call(get_mode).
@@ -322,6 +326,7 @@ start_link(Flags) ->
 %%-----------------------------------------------------------------
 
 do_start(Flags) ->
+    maybe_warn_for_cache(),
     load_code_server_prerequisites(),
 
     Mode = get_mode(Flags),
@@ -452,30 +457,14 @@ which(File, Base, [Directory|Tail]) ->
       Filename :: file:filename(),
       Absname :: file:filename().
 where_is_file(File) when is_list(File) ->
-    case call({is_cached,File}) of
-	no ->
-	    Path = get_path(),
-	    which(File, ".", Path);
-	Dir ->
-	    filename:join(Dir, File)
-    end.
+    Path = get_path(),
+    which(File, ".", Path).
 
 -spec where_is_file(Path :: file:filename(), Filename :: file:filename()) ->
         file:filename() | 'non_existing'.
 
 where_is_file(Path, File) when is_list(Path), is_list(File) ->
-    CodePath = get_path(),
-    if
-	Path =:= CodePath ->
-	    case call({is_cached, File}) of
-		no ->
-		    which(File, ".", Path);
-		Dir ->
-		    filename:join(Dir, File)
-	    end;
-	true ->
-	    which(File, ".", Path)
-    end.
+    which(File, ".", Path).
 
 -spec set_primary_archive(ArchiveFile :: file:filename(),
 			  ArchiveBin :: binary(),
@@ -553,6 +542,22 @@ has_ext(Ext, Extlen, File) ->
     end.
 
 %%%
+%%% Warning for deprecated code path cache.
+%%%
+
+maybe_warn_for_cache() ->
+    case init:get_argument(code_path_cache) of
+	{ok, _} ->
+	    cache_warning();
+	error ->
+	    ok
+    end.
+
+cache_warning() ->
+    W = "The code path cache functionality has been removed",
+    error_logger:warning_report(W).
+
+%%%
 %%% Silently load native code for all modules loaded so far.
 %%%
 
diff --git a/lib/kernel/src/code_server.erl b/lib/kernel/src/code_server.erl
index e461c95d19..1a42cc0e9f 100644
--- a/lib/kernel/src/code_server.erl
+++ b/lib/kernel/src/code_server.erl
@@ -40,7 +40,6 @@
 		path,
 		moddb,
 		namedb,
-		cache = no_cache,
 		mode = interactive,
 		on_load = []}).
 -type state() :: #state{}.
@@ -89,19 +88,11 @@ init(Ref, Parent, [Root,Mode0]) ->
 	end,
 
     Path = add_loader_path(IPath, Mode),
-    State0 = #state{root = Root,
-		    path = Path,
-		    moddb = Db,
-		    namedb = init_namedb(Path),
-		    mode = Mode},
-
-    State =
-	case init:get_argument(code_path_cache) of
-	    {ok, _} -> 
-		create_cache(State0);
-	    error -> 
-		State0
-	end,
+    State = #state{root = Root,
+		   path = Path,
+		   moddb = Db,
+		   namedb = init_namedb(Path),
+		   mode = Mode},
 
     put(?ANY_NATIVE_CODE_LOADED, false),
 
@@ -264,50 +255,29 @@ handle_call({load_file,Mod}, Caller, St) ->
     end;
 
 handle_call({add_path,Where,Dir0}, {_From,_Tag},
-	    #state{cache=Cache0,namedb=Namedb,path=Path0}=S) ->
-    case Cache0 of
-	no_cache ->
-	    {Resp,Path} = add_path(Where, Dir0, Path0, Namedb),
-	    {reply,Resp,S#state{path=Path}};
-	_ ->
-	    Dir = absname(Dir0), %% Cache always expands the path 
-	    {Resp,Path} = add_path(Where, Dir, Path0, Namedb),
-	    Cache = update_cache([Dir], Where, Cache0),
-	    {reply,Resp,S#state{path=Path,cache=Cache}}
-    end;
+	    #state{namedb=Namedb,path=Path0}=S) ->
+    {Resp,Path} = add_path(Where, Dir0, Path0, Namedb),
+    {reply,Resp,S#state{path=Path}};
 
 handle_call({add_paths,Where,Dirs0}, {_From,_Tag},
-	    #state{cache=Cache0,namedb=Namedb,path=Path0}=S) ->
-    case Cache0 of
-	no_cache ->
-	    {Resp,Path} = add_paths(Where, Dirs0, Path0, Namedb),
-	    {reply,Resp,S#state{path=Path}};
-	_ ->
-	    %% Cache always expands the path 
-	    Dirs = [absname(Dir) || Dir <- Dirs0], 
-	    {Resp,Path} = add_paths(Where, Dirs, Path0, Namedb),
-	    Cache=update_cache(Dirs,Where,Cache0),
-	    {reply,Resp,S#state{cache=Cache,path=Path}}
-    end;
+	    #state{namedb=Namedb,path=Path0}=S) ->
+    {Resp,Path} = add_paths(Where, Dirs0, Path0, Namedb),
+    {reply,Resp,S#state{path=Path}};
 
 handle_call({set_path,PathList}, {_From,_Tag},
 	    #state{path=Path0,namedb=Namedb}=S) ->
     {Resp,Path,NewDb} = set_path(PathList, Path0, Namedb),
-    {reply,Resp,rehash_cache(S#state{path=Path,namedb=NewDb})};
+    {reply,Resp,S#state{path=Path,namedb=NewDb}};
 
 handle_call({del_path,Name}, {_From,_Tag},
 	    #state{path=Path0,namedb=Namedb}=S) ->
     {Resp,Path} = del_path(Name, Path0, Namedb),
-    {reply,Resp,rehash_cache(S#state{path=Path})};
+    {reply,Resp,S#state{path=Path}};
 
 handle_call({replace_path,Name,Dir}, {_From,_Tag},
 	    #state{path=Path0,namedb=Namedb}=S) ->
     {Resp,Path} = replace_path(Name, Dir, Path0, Namedb),
-    {reply,Resp,rehash_cache(S#state{path=Path})};
-
-handle_call(rehash, {_From,_Tag}, S0) ->
-    S = create_cache(S0),
-    {reply,ok,S};
+    {reply,Resp,S#state{path=Path}};
 
 handle_call(get_path, {_From,_Tag}, S) ->
     {reply,S#state.path,S};
@@ -398,9 +368,6 @@ handle_call({is_sticky, Mod}, {_From,_Tag}, S) ->
 handle_call(stop,{_From,_Tag}, S) ->
     {stop,normal,stopped,S};
 
-handle_call({is_cached,_File}, {_From,_Tag}, S=#state{cache=no_cache}) ->
-    {reply, no, S};
-
 handle_call({set_primary_archive, File, ArchiveBin, FileInfo, ParserFun}, {_From,_Tag}, S=#state{mode=Mode}) ->
     case erl_prim_loader:set_primary_archive(File, ArchiveBin, FileInfo, ParserFun) of
 	{ok, Files} ->
@@ -409,26 +376,6 @@ handle_call({set_primary_archive, File, ArchiveBin, FileInfo, ParserFun}, {_From
 	    {reply, Error, S}
     end;
 
-handle_call({is_cached,File}, {_From,_Tag}, S=#state{cache=Cache}) ->
-    ObjExt = objfile_extension(),
-    Ext = filename:extension(File),
-    Type = case Ext of
-	       ObjExt -> obj;
-	       ".app" -> app;
-	       _ -> undef
-	   end,
-    if Type =:= undef -> 
-	    {reply, no, S};
-       true ->
-	    Key = {Type,list_to_atom(filename:rootname(File, Ext))},
-	    case ets:lookup(Cache, Key) of
-		[] -> 
-		    {reply, no, S};
-		[{Key,Dir}] ->
-		    {reply, Dir, S}
-	    end
-    end;
-
 handle_call(get_mode, {_From,_Tag}, S=#state{mode=Mode}) ->
     {reply, Mode, S};
 
@@ -448,69 +395,6 @@ do_mod_call(Action, Module, Error, St) ->
     end.
 
 %% --------------------------------------------------------------
-%% Cache functions 
-%% --------------------------------------------------------------
-
-create_cache(St = #state{cache = no_cache}) ->
-    Cache = ets:new(code_cache, [protected]),
-    rehash_cache(Cache, St);
-create_cache(St) ->
-    rehash_cache(St).
-
-rehash_cache(St = #state{cache = no_cache}) ->
-    St;
-rehash_cache(St = #state{cache = OldCache}) ->
-    ets:delete(OldCache), 
-    Cache = ets:new(code_cache, [protected]),
-    rehash_cache(Cache, St).
-
-rehash_cache(Cache, St = #state{path = Path}) ->
-    Exts = [{obj,objfile_extension()}, {app,".app"}],
-    {Cache,NewPath} = locate_mods(lists:reverse(Path), first, Exts, Cache, []),
-    St#state{cache = Cache, path=NewPath}.
-
-update_cache(Dirs, Where, Cache0) ->
-    Exts = [{obj,objfile_extension()}, {app,".app"}],
-    {Cache, _} = locate_mods(Dirs, Where, Exts, Cache0, []),
-    Cache.
-
-locate_mods([Dir0|Path], Where, Exts, Cache, Acc) ->
-    Dir = absname(Dir0), %% Cache always expands the path 
-    case erl_prim_loader:list_dir(Dir) of
-	{ok, Files} -> 
-	    Cache = filter_mods(Files, Where, Exts, Dir, Cache),
-	    locate_mods(Path, Where, Exts, Cache, [Dir|Acc]);
-	error ->
-	    locate_mods(Path, Where, Exts, Cache, Acc)
-    end;
-locate_mods([], _, _, Cache, Path) ->
-    {Cache,Path}.
-
-filter_mods([File|Rest], Where, Exts, Dir, Cache) ->
-    Ext = filename:extension(File),
-    Root = list_to_atom(filename:rootname(File, Ext)),
-    case lists:keyfind(Ext, 2, Exts) of
-	{Type, _} ->
-	    Key = {Type,Root},
-	    case Where of
-		first ->
-		    true = ets:insert(Cache, {Key,Dir});
-		last ->
-		    case ets:lookup(Cache, Key) of
-			[] ->
-			    true = ets:insert(Cache, {Key,Dir});
-			_ ->
-			    ignore
-		    end
-	    end;
-	false ->
-	    ok
-    end,
-    filter_mods(Rest, Where, Exts, Dir, Cache);
-filter_mods([], _, _, _, Cache) ->
-    Cache.
-
-%% --------------------------------------------------------------
 %% Path handling functions.
 %% --------------------------------------------------------------
 
@@ -1238,16 +1122,6 @@ load_abs(File, Mod0, Caller, St) ->
 	    {reply,{error,nofile},St}
     end.
 
-try_load_module(Mod, Dir, Caller, St) ->
-    File = filename:append(Dir, to_list(Mod) ++
-			   objfile_extension()),
-    case erl_prim_loader:get_file(File) of
-	error -> 
-	    {reply,error,St};
-	{ok,Binary,FName} ->
-	    try_load_module(absname(FName), Mod, Binary, Caller, St)
-    end.
-
 try_load_module(File, Mod, Bin, {From,_}=Caller, St0) ->
     M = to_atom(Mod),
     case pending_on_load(M, From, St0) of
@@ -1345,26 +1219,12 @@ load_file(Mod0, {From,_}=Caller, St0) ->
 	{yes,St} -> {noreply,St}
     end.
 
-load_file_1(Mod, Caller, #state{path=Path,cache=no_cache}=St) ->
+load_file_1(Mod, Caller, #state{path=Path}=St) ->
     case mod_to_bin(Path, Mod) of
 	error ->
 	    {reply,{error,nofile},St};
 	{Mod,Binary,File} ->
 	    try_load_module(File, Mod, Binary, Caller, St)
-    end;
-load_file_1(Mod, Caller, #state{cache=Cache}=St0) ->
-    Key = {obj,Mod},
-    case ets:lookup(Cache, Key) of
-	[] -> 
-	    St = rehash_cache(St0),
-	    case ets:lookup(St#state.cache, Key) of
-		[] -> 
-		    {reply,{error,nofile},St};
-		[{Key,Dir}] ->
-		    try_load_module(Mod, Dir, Caller, St)
-	    end;
-	[{Key,Dir}] ->
-	    try_load_module(Mod, Dir, Caller, St0)
     end.
 
 mod_to_bin([Dir|Tail], Mod) ->
@@ -1421,249 +1281,22 @@ absname_vr([[X, $:]|Name], _, _AbsBase) ->
     absname(filename:join(Name), Dcwd).
 
 
-%% do_purge(Module)
-%%  Kill all processes running code from *old* Module, and then purge the
-%%  module. Return true if any processes killed, else false.
 
-do_purge(Mod0) ->
-    Mod = to_atom(Mod0),
-    case erlang:check_old_code(Mod) of
-	false ->
-	    false;
-	true ->
-	    Res = check_proc_code(erlang:processes(), Mod, true),
-	    try
-		erlang:purge_module(Mod)
-	    catch
-		_:_ -> ignore
-	    end,
-	    Res
+is_loaded(M, Db) ->
+    case ets:lookup(Db, M) of
+	[{M,File}] -> {file,File};
+	[] -> false
     end.
 
-%% do_soft_purge(Module)
-%% Purge old code only if no procs remain that run old code.
-%% Return true in that case, false if procs remain (in this
-%% case old code is not purged)
+do_purge(Mod0) ->
+    Mod = to_atom(Mod0),
+    {_WasOld, DidKill} = erts_code_purger:purge(Mod),
+    DidKill.
 
 do_soft_purge(Mod0) ->
     Mod = to_atom(Mod0),
-    case erlang:check_old_code(Mod) of
-	false ->
-	    true;
-	true ->
-	    case check_proc_code(erlang:processes(), Mod, false) of
-		false ->
-		    false;
-		true ->
-		    try
-			erlang:purge_module(Mod)
-		    catch
-			_:_ -> ignore
-		    end,
-		    true
-	    end
-    end.
+    erts_code_purger:soft_purge(Mod).
 
-%%
-%% check_proc_code(Pids, Mod, Hard) - Send asynchronous
-%%   requests to all processes to perform a check_process_code
-%%   operation. Each process will check their own state and
-%%   reply with the result. If 'Hard' equals
-%%   - true, processes that refer 'Mod' will be killed. If
-%%     any processes were killed true is returned; otherwise,
-%%     false.
-%%   - false, and any processes refer 'Mod', false will
-%%     returned; otherwise, true.
-%%
-%%   Requests will be sent to all processes identified by
-%%   Pids at once, but without allowing GC to be performed.
-%%   Check process code operations that are aborted due to
-%%   GC need, will be restarted allowing GC. However, only
-%%   ?MAX_CPC_GC_PROCS outstanding operation allowing GC at
-%%   a time will be allowed. This in order not to blow up
-%%   memory wise.
-%%
-%%   We also only allow ?MAX_CPC_NO_OUTSTANDING_KILLS
-%%   outstanding kills. This both in order to avoid flooding
-%%   our message queue with 'DOWN' messages and limiting the
-%%   amount of memory used to keep references to all
-%%   outstanding kills.
-%%
-
-%% We maybe should allow more than two outstanding
-%% GC requests, but for now we play it safe...
--define(MAX_CPC_GC_PROCS, 2).
--define(MAX_CPC_NO_OUTSTANDING_KILLS, 10).
-
--record(cpc_static, {hard, module, tag}).
-
--record(cpc_kill, {outstanding = [],
-		   no_outstanding = 0,
-		   waiting = [],
-		   killed = false}).
-
-check_proc_code(Pids, Mod, Hard) ->
-    Tag = erlang:make_ref(),
-    CpcS = #cpc_static{hard = Hard,
-		       module = Mod,
-		       tag = Tag},
-    check_proc_code(CpcS, cpc_init(CpcS, Pids, 0), 0, [], #cpc_kill{}, true).
-
-check_proc_code(#cpc_static{hard = true}, 0, 0, [],
-		#cpc_kill{outstanding = [], waiting = [], killed = Killed},
-		true) ->
-    %% No outstanding requests. We did a hard check, so result is whether or
-    %% not we killed any processes...
-    Killed;
-check_proc_code(#cpc_static{hard = false}, 0, 0, [], _KillState, Success) ->
-    %% No outstanding requests and we did a soft check...
-    Success;
-check_proc_code(#cpc_static{hard = false, tag = Tag} = CpcS, NoReq0, NoGcReq0,
-		[], _KillState, false) ->
-    %% Failed soft check; just cleanup the remaining replies corresponding
-    %% to the requests we've sent...
-    {NoReq1, NoGcReq1} = receive
-			     {check_process_code, {Tag, _P, GC}, _Res} ->
-				 case GC of
-				     false -> {NoReq0-1, NoGcReq0};
-				     true -> {NoReq0, NoGcReq0-1}
-				 end
-			 end,
-    check_proc_code(CpcS, NoReq1, NoGcReq1, [], _KillState, false);
-check_proc_code(#cpc_static{tag = Tag} = CpcS, NoReq0, NoGcReq0, NeedGC0,
-		KillState0, Success) ->
-
-    %% Check if we should request a GC operation
-    {NoGcReq1, NeedGC1} = case NoGcReq0 < ?MAX_CPC_GC_PROCS of
-			      GcOpAllowed when GcOpAllowed == false;
-					       NeedGC0 == [] ->
-				  {NoGcReq0, NeedGC0};
-			      _ ->
-				  {NoGcReq0+1, cpc_request_gc(CpcS,NeedGC0)}
-			  end,
-
-    %% Wait for a cpc reply or 'DOWN' message
-    {NoReq1, NoGcReq2, Pid, Result, KillState1} = cpc_recv(Tag,
-							   NoReq0,
-							   NoGcReq1,
-							   KillState0),
-
-    %% Check the result of the reply
-    case Result of
-	aborted ->
-	    %% Operation aborted due to the need to GC in order to
-	    %% determine if the process is referring the module.
-	    %% Schedule the operation for restart allowing GC...
-	    check_proc_code(CpcS, NoReq1, NoGcReq2, [Pid|NeedGC1], KillState1,
-			    Success);
-	false ->
-	    %% Process not referring the module; done with this process...
-	    check_proc_code(CpcS, NoReq1, NoGcReq2, NeedGC1, KillState1,
-			    Success);
-	true ->
-	    %% Process referring the module...
-	    case CpcS#cpc_static.hard of
-		false ->
-		    %% ... and soft check. The whole operation failed so
-		    %% no point continuing; clean up and fail...
-		    check_proc_code(CpcS, NoReq1, NoGcReq2, [], KillState1,
-				    false);
-		true ->
-		    %% ... and hard check; schedule kill of it...
-		    check_proc_code(CpcS, NoReq1, NoGcReq2, NeedGC1,
-				    cpc_sched_kill(Pid, KillState1), Success)
-	    end;
-	'DOWN' ->
-	    %% Handled 'DOWN' message
-	    check_proc_code(CpcS, NoReq1, NoGcReq2, NeedGC1,
-			    KillState1, Success)
-    end.
-
-cpc_recv(Tag, NoReq, NoGcReq, #cpc_kill{outstanding = []} = KillState) ->
-    receive
-	{check_process_code, {Tag, Pid, GC}, Res} ->
-	    cpc_handle_cpc(NoReq, NoGcReq, GC, Pid, Res, KillState)
-    end;
-cpc_recv(Tag, NoReq, NoGcReq,
-	 #cpc_kill{outstanding = [R0, R1, R2, R3, R4 | _]} = KillState) ->
-    receive
-	{'DOWN', R, process, _, _} when R == R0;
-					R == R1;
-					R == R2;
-					R == R3;
-					R == R4 ->
-	    cpc_handle_down(NoReq, NoGcReq, R, KillState); 
-	{check_process_code, {Tag, Pid, GC}, Res} ->
-	    cpc_handle_cpc(NoReq, NoGcReq, GC, Pid, Res, KillState)
-    end;
-cpc_recv(Tag, NoReq, NoGcReq, #cpc_kill{outstanding = [R|_]} = KillState) ->
-    receive
-	{'DOWN', R, process, _, _} ->
-	    cpc_handle_down(NoReq, NoGcReq, R, KillState); 
-	{check_process_code, {Tag, Pid, GC}, Res} ->
-	    cpc_handle_cpc(NoReq, NoGcReq, GC, Pid, Res, KillState)
-    end.
-
-cpc_handle_down(NoReq, NoGcReq, R, #cpc_kill{outstanding = Rs,
-					     no_outstanding = N} = KillState) ->
-    {NoReq, NoGcReq, undefined, 'DOWN',
-     cpc_sched_kill_waiting(KillState#cpc_kill{outstanding = cpc_list_rm(R, Rs),
-					       no_outstanding = N-1})}.
-
-cpc_list_rm(R, [R|Rs]) ->
-    Rs;
-cpc_list_rm(R0, [R1|Rs]) ->
-    [R1|cpc_list_rm(R0, Rs)].
-
-cpc_handle_cpc(NoReq, NoGcReq, false, Pid, Res, KillState) ->
-    {NoReq-1, NoGcReq, Pid, Res, KillState};
-cpc_handle_cpc(NoReq, NoGcReq, true, Pid, Res, KillState) ->
-    {NoReq, NoGcReq-1, Pid, Res, KillState}.
-
-cpc_sched_kill_waiting(#cpc_kill{waiting = []} = KillState) ->
-    KillState;
-cpc_sched_kill_waiting(#cpc_kill{outstanding = Rs,
-				 no_outstanding = N,
-				 waiting = [P|Ps]} = KillState) ->
-    R = erlang:monitor(process, P),
-    exit(P, kill),
-    KillState#cpc_kill{outstanding = [R|Rs],
-		       no_outstanding = N+1,
-		       waiting = Ps,
-		       killed = true}.
-
-cpc_sched_kill(Pid, #cpc_kill{no_outstanding = N, waiting = Pids} = KillState)
-  when N >= ?MAX_CPC_NO_OUTSTANDING_KILLS ->
-    KillState#cpc_kill{waiting = [Pid|Pids]};
-cpc_sched_kill(Pid,
-	       #cpc_kill{outstanding = Rs, no_outstanding = N} = KillState) ->
-    R = erlang:monitor(process, Pid),
-    exit(Pid, kill),
-    KillState#cpc_kill{outstanding = [R|Rs],
-		       no_outstanding = N+1,
-		       killed = true}.
-
-cpc_request(#cpc_static{tag = Tag, module = Mod}, Pid, AllowGc) ->
-    erlang:check_process_code(Pid, Mod, [{async, {Tag, Pid, AllowGc}},
-					 {allow_gc, AllowGc}]).
-
-cpc_request_gc(CpcS, [Pid|Pids]) ->
-    cpc_request(CpcS, Pid, true),
-    Pids.
-
-cpc_init(_CpcS, [], NoReqs) ->
-    NoReqs;
-cpc_init(CpcS, [Pid|Pids], NoReqs) ->
-    cpc_request(CpcS, Pid, false),
-    cpc_init(CpcS, Pids, NoReqs+1).
-
-% end of check_proc_code() implementation.
-
-is_loaded(M, Db) ->
-    case ets:lookup(Db, M) of
-	[{M,File}] -> {file,File};
-	[] -> false
-    end.
 
 %% -------------------------------------------------------
 %% The on_load functionality.
diff --git a/lib/kernel/src/disk_log.erl b/lib/kernel/src/disk_log.erl
index f5450f30af..9b44021872 100644
--- a/lib/kernel/src/disk_log.erl
+++ b/lib/kernel/src/disk_log.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %% 
-%% Copyright Ericsson AB 1997-2013. All Rights Reserved.
+%% Copyright Ericsson AB 1997-2015. All Rights Reserved.
 %% 
 %% Licensed under the Apache License, Version 2.0 (the "License");
 %% you may not use this file except in compliance with the License.
@@ -1310,13 +1310,20 @@ compare_arg(_Attr, _Val, _A) ->
 
 %% -> {ok, Res, log(), Cnt} | Error
 do_open(A) ->
-    L = #log{name = A#arg.name,
-	     filename = A#arg.file,
-	     size = A#arg.size,
-	     head = mk_head(A#arg.head, A#arg.format),
-	     mode = A#arg.mode,
-	     version = A#arg.version},
-    do_open2(L, A).
+    #arg{type = Type, format = Format, name = Name, head = Head0,
+         file = FName, repair = Repair, size = Size, mode = Mode,
+         version = V} = A,
+    Head = mk_head(Head0, Format),
+    case do_open2(Type, Format, Name, FName, Repair, Size, Mode, Head, V) of
+        {ok, Ret, Extra, FormatType, NoItems} ->
+            L = #log{name = Name, type = Type, format = Format,
+                     filename = FName, size = Size,
+                     format_type = FormatType, head = Head, mode = Mode,
+                     version = V, extra = Extra},
+            {ok, Ret, L, NoItems};
+        Error ->
+            Error
+    end.
 
 mk_head({head, Term}, internal) -> {ok, term_to_binary(Term)};
 mk_head({head, Bytes}, external) -> {ok, check_bytes(Bytes)};
@@ -1432,57 +1439,44 @@ do_inc_wrap_file(L) ->
 %%-----------------------------------------------------------------
 %% -> {ok, Reply, log(), Cnt} | Error
 %% Note: the header is always written, even if the log size is too small.
-do_open2(L, #arg{type = halt, format = internal, name = Name, 
-		 file = FName, repair = Repair, size = Size, mode = Mode}) ->
-    case catch disk_log_1:int_open(FName, Repair, Mode, L#log.head) of
+do_open2(halt, internal, Name, FName, Repair, Size, Mode, Head, _V) ->
+    case catch disk_log_1:int_open(FName, Repair, Mode, Head) of
 	{ok, {_Alloc, FdC, {NoItems, _NoBytes}, FileSize}} ->
             Halt = #halt{fdc = FdC, curB = FileSize, size = Size},
-	    {ok, {ok, Name}, L#log{format_type = halt_int, extra = Halt}, 
-	     NoItems};
+	    {ok, {ok, Name}, Halt, halt_int, NoItems};
 	{repaired, FdC, Rec, Bad, FileSize} ->
             Halt = #halt{fdc = FdC, curB = FileSize, size = Size},
 	    {ok, {repaired, Name, {recovered, Rec}, {badbytes, Bad}},
-	     L#log{format_type = halt_int, extra = Halt},
-	     Rec};
+             Halt, halt_int, Rec};
 	Error ->
 	    Error
     end;
-do_open2(L, #arg{type = wrap, format = internal, size = {MaxB, MaxF}, 
-		 name = Name, repair = Repair, file = FName, mode = Mode,
-		 version = V}) ->
+do_open2(wrap, internal, Name, FName, Repair, Size, Mode, Head, V) ->
+    {MaxB, MaxF} = Size,
     case catch 
-      disk_log_1:mf_int_open(FName, MaxB, MaxF, Repair, Mode, L#log.head, V) of
+      disk_log_1:mf_int_open(FName, MaxB, MaxF, Repair, Mode, Head, V) of
 	{ok, Handle, Cnt} ->
-	    {ok, {ok, Name}, L#log{type = wrap,
-				   format_type = wrap_int, 
-				   extra = Handle}, Cnt};
+	    {ok, {ok, Name}, Handle, wrap_int, Cnt};
 	{repaired, Handle, Rec, Bad, Cnt} ->
 	    {ok, {repaired, Name, {recovered, Rec}, {badbytes, Bad}},
-	     L#log{type = wrap, format_type = wrap_int, extra = Handle}, Cnt};
+	     Handle, wrap_int, Cnt};
 	Error ->
 	    Error
     end;
-do_open2(L, #arg{type = halt, format = external, file = FName, name = Name,
-		 size = Size, repair = Repair, mode = Mode}) ->
-    case catch disk_log_1:ext_open(FName, Repair, Mode, L#log.head) of
+do_open2(halt, external, Name, FName, Repair, Size, Mode, Head, _V) ->
+    case catch disk_log_1:ext_open(FName, Repair, Mode, Head) of
 	{ok, {_Alloc, FdC, {NoItems, _NoBytes}, FileSize}} ->
             Halt = #halt{fdc = FdC, curB = FileSize, size = Size},
-	    {ok, {ok, Name}, 
-             L#log{format_type = halt_ext, format = external, extra = Halt}, 
-	     NoItems};
+	    {ok, {ok, Name}, Halt, halt_ext, NoItems};
 	Error ->
 	    Error
     end;
-do_open2(L, #arg{type = wrap, format = external, size = {MaxB, MaxF},
-		 name = Name, file = FName, repair = Repair, mode = Mode,
-		 version = V}) ->
+do_open2(wrap, external, Name, FName, Repair, Size, Mode, Head, V) ->
+    {MaxB, MaxF} = Size,
     case catch 
-      disk_log_1:mf_ext_open(FName, MaxB, MaxF, Repair, Mode, L#log.head, V) of
+      disk_log_1:mf_ext_open(FName, MaxB, MaxF, Repair, Mode, Head, V) of
 	{ok, Handle, Cnt} ->
-	    {ok, {ok, Name}, L#log{type = wrap,
-				   format_type = wrap_ext, 
-				   extra = Handle,
-				   format = external}, Cnt};
+	    {ok, {ok, Name}, Handle, wrap_ext, Cnt};
 	Error ->
 	    Error
     end.
diff --git a/lib/kernel/src/disk_log.hrl b/lib/kernel/src/disk_log.hrl
index 6c0aea070f..3262d979ee 100644
--- a/lib/kernel/src/disk_log.hrl
+++ b/lib/kernel/src/disk_log.hrl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %%
-%% Copyright Ericsson AB 1997-2012. All Rights Reserved.
+%% Copyright Ericsson AB 1997-2015. All Rights Reserved.
 %%
 %% Licensed under the Apache License, Version 2.0 (the "License");
 %% you may not use this file except in compliance with the License.
@@ -152,8 +152,8 @@
 	 users = 0         :: non_neg_integer(),   %% non-linked users
 	 filename          :: file:filename(),	   %% real name of the file
 	 owners = []       :: [{pid(), boolean()}],%% [{pid, notify}]
-	 type = halt	   :: dlog_type(),
-	 format = internal :: dlog_format(),
+	 type              :: dlog_type(),
+	 format            :: dlog_format(),
 	 format_type	   :: dlog_format_type(),
 	 head = none,         %%  none | {head, H} | {M,F,A}
 	                      %%  called when wraplog wraps
diff --git a/lib/kernel/src/erts_debug.erl b/lib/kernel/src/erts_debug.erl
index 39308c0043..8e2b5ad214 100644
--- a/lib/kernel/src/erts_debug.erl
+++ b/lib/kernel/src/erts_debug.erl
@@ -34,7 +34,8 @@
 -export([breakpoint/2, disassemble/1, display/1, dist_ext_to_term/2,
          dump_monitors/1, dump_links/1, flat_size/1,
          get_internal_state/1, instructions/0, lock_counters/1,
-         map_info/1, same/2, set_internal_state/2]).
+         map_info/1, same/2, set_internal_state/2,
+         size_shared/1, copy_shared/1]).
 
 -spec breakpoint(MFA, Flag) -> non_neg_integer() when
       MFA :: {Module :: module(),
@@ -86,6 +87,18 @@ dump_links(_) ->
 flat_size(_) ->
     erlang:nif_error(undef).
 
+-spec size_shared(Term) -> non_neg_integer() when
+      Term :: term().
+
+size_shared(_) ->
+    erlang:nif_error(undef).
+
+-spec copy_shared(Term) -> term() when
+      Term :: term().
+
+copy_shared(_) ->
+    erlang:nif_error(undef).
+
 -spec get_internal_state(W) -> term() when
       W :: reds_left | node_and_dist_references | monitoring_nodes
          | next_pid | 'DbTable_words' | check_io_debug
@@ -230,7 +243,7 @@ map_size(Map,Seen0,Sum0) ->
     %% is not allowed to leak anywhere. They are only allowed in
     %% containers (cons cells and tuples, not maps), in gc and
     %% in erts_debug:same/2
-    case erts_internal:map_type(Map) of
+    case erts_internal:term_type(Map) of
         flatmap ->
             Kt = erts_internal:map_to_tuple_keys(Map),
             Vs = maps:values(Map),
diff --git a/lib/kernel/src/file_io_server.erl b/lib/kernel/src/file_io_server.erl
index bf8b9e2747..deb7b315b1 100644
--- a/lib/kernel/src/file_io_server.erl
+++ b/lib/kernel/src/file_io_server.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %%
-%% Copyright Ericsson AB 2000-2013. All Rights Reserved.
+%% Copyright Ericsson AB 2000-2015. All Rights Reserved.
 %%
 %% Licensed under the Apache License, Version 2.0 (the "License");
 %% you may not use this file except in compliance with the License.
@@ -206,8 +206,8 @@ io_reply(From, ReplyAs, Reply) ->
 file_request({advise,Offset,Length,Advise},
          #state{handle=Handle}=State) ->
     case ?PRIM_FILE:advise(Handle, Offset, Length, Advise) of
-    {error,_}=Reply ->
-        {stop,normal,Reply,State};
+    {error,Reason}=Reply ->
+        {stop,Reason,Reply,State};
     Reply ->
         {reply,Reply,State}
     end;
@@ -215,62 +215,91 @@ file_request({allocate, Offset, Length},
          #state{handle = Handle} = State) ->
     Reply = ?PRIM_FILE:allocate(Handle, Offset, Length),
     {reply, Reply, State};
+file_request({pread,At,Sz}, State)
+  when At =:= cur;
+       At =:= {cur,0} ->
+    case get_chars(Sz, latin1, State) of
+	{reply,Reply,NewState}
+	  when is_list(Reply);
+	       is_binary(Reply) ->
+	    {reply,{ok,Reply},NewState};
+	Other ->
+	    Other
+    end;
 file_request({pread,At,Sz}, 
-	     #state{handle=Handle,buf=Buf,read_mode=ReadMode}=State) ->
+	     #state{handle=Handle,buf=Buf}=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)
+	{error,_} = Reply ->
+	    {error,Reply,State};
+	_ ->
+	    case get_chars(Sz, latin1, State#state{buf= <<>>}) of
+		{reply,Reply,NewState}
+		  when is_list(Reply);
+		       is_binary(Reply) ->
+		    {reply,{ok,Reply},NewState};
+		Other ->
+		    Other
+	    end
     end;
+file_request({pwrite,At,Data},
+	     #state{buf= <<>>}=State)
+  when At =:= cur;
+       At =:= {cur,0} ->
+    put_chars(Data, latin1, State);
 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)
+	{error,_} = Reply ->
+	    {error,Reply,State};
+	_ ->
+	    put_chars(Data, latin1, State)
     end;
 file_request(datasync,
 	     #state{handle=Handle}=State) ->
     case ?PRIM_FILE:datasync(Handle) of
-	{error,_}=Reply ->
-	    {stop,normal,Reply,State};
+	{error,Reason}=Reply ->
+	    {stop,Reason,Reply,State};
 	Reply ->
 	    {reply,Reply,State}
     end;
 file_request(sync, 
 	     #state{handle=Handle}=State) ->
     case ?PRIM_FILE:sync(Handle) of
-	{error,_}=Reply ->
-	    {stop,normal,Reply,State};
+	{error,Reason}=Reply ->
+	    {stop,Reason,Reply,State};
 	Reply ->
 	    {reply,Reply,State}
     end;
 file_request(close, 
 	     #state{handle=Handle}=State) ->
-    {stop,normal,?PRIM_FILE:close(Handle),State#state{buf= <<>>}};
+    case ?PRIM_FILE:close(Handle) of
+	{error,Reason}=Reply ->
+	    {stop,Reason,Reply,State#state{buf= <<>>}};
+	Reply ->
+	    {stop,normal,Reply,State#state{buf= <<>>}}
+    end;
 file_request({position,At}, 
 	     #state{handle=Handle,buf=Buf}=State) ->
-    std_reply(position(Handle, At, Buf), State);
+    case position(Handle, At, Buf) of
+	{error,_} = Reply ->
+	    {error,Reply,State};
+	Reply ->
+	    std_reply(Reply, State)
+    end;
 file_request(truncate, 
 	     #state{handle=Handle}=State) ->
     case ?PRIM_FILE:truncate(Handle) of
-	{error,_Reason}=Reply ->
-	    {stop,normal,Reply,State#state{buf= <<>>}};
+	{error,Reason}=Reply ->
+	    {stop,Reason,Reply,State#state{buf= <<>>}};
 	Reply ->
-	    {reply,Reply,State}
+	    std_reply(Reply, State)
     end;
 file_request(Unknown, 
 	     #state{}=State) ->
     Reason = {request, Unknown},
     {error,{error,Reason},State}.
 
+%% Standard reply and clear buffer
 std_reply({error,_}=Reply, State) ->
     {error,Reply,State#state{buf= <<>>}};
 std_reply(Reply, State) ->
@@ -286,8 +315,8 @@ io_request({put_chars, Enc, Chars},
 io_request({put_chars, Enc, Chars}, 
 	   #state{handle=Handle,buf=Buf}=State) ->
     case position(Handle, cur, Buf) of
-	{error,_}=Reply ->
-	    {stop,normal,Reply,State#state{buf= <<>>}};
+	{error,Reason}=Reply ->
+	    {stop,Reason,Reply,State};
 	_ ->
 	    put_chars(Chars, Enc, State#state{buf= <<>>})
     end;
@@ -368,23 +397,27 @@ io_request_loop([Request|Tail],
 %% I/O request put_chars
 %%
 put_chars(Chars, latin1, #state{handle=Handle, unic=latin1}=State) ->
+    NewState = State#state{buf = <<>>},
     case ?PRIM_FILE:write(Handle, Chars) of
-	{error,_}=Reply ->
-	    {stop,normal,Reply,State};
+	{error,Reason}=Reply ->
+	    {stop,Reason,Reply,NewState};
 	Reply ->
-	    {reply,Reply,State}
+	    {reply,Reply,NewState}
     end;
 put_chars(Chars, InEncoding, #state{handle=Handle, unic=OutEncoding}=State) ->
+    NewState = State#state{buf = <<>>},
     case unicode:characters_to_binary(Chars,InEncoding,OutEncoding) of
 	Bin when is_binary(Bin) ->
 	    case ?PRIM_FILE:write(Handle, Bin) of
-		{error,_}=Reply ->
-		    {stop,normal,Reply,State};
+		{error,Reason}=Reply ->
+		    {stop,Reason,Reply,NewState};
 		Reply ->
-		    {reply,Reply,State}
+		    {reply,Reply,NewState}
 	    end;
 	{error,_,_} ->
-	    {stop,normal,{error,{no_translation, InEncoding, OutEncoding}},State}
+	    {stop,no_translation,
+	     {error,{no_translation, InEncoding, OutEncoding}},
+	     NewState}
     end.
 
 get_line(S, {<<>>, Cont}, OutEnc,
@@ -884,11 +917,14 @@ cbv({utf32,little},_) ->
 
 %% 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 is_binary(Buf) ->
-    ?PRIM_FILE:position(Handle, {cur, Offs-byte_size(Buf)});
-position(Handle, At, _Buf) ->
-    ?PRIM_FILE:position(Handle, At).
-
+position(Handle, At, Buf) ->
+    ?PRIM_FILE:position(
+       Handle,
+       case At of
+	   cur ->
+	       {cur, -byte_size(Buf)};
+	   {cur, Offs} ->
+	       {cur, Offs-byte_size(Buf)};
+	   _ ->
+	       At
+       end).
diff --git a/lib/kernel/src/global.erl b/lib/kernel/src/global.erl
index 2be1efaf24..0c73ead7c5 100644
--- a/lib/kernel/src/global.erl
+++ b/lib/kernel/src/global.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %%
-%% Copyright Ericsson AB 1996-2014. All Rights Reserved.
+%% Copyright Ericsson AB 1996-2015. All Rights Reserved.
 %%
 %% Licensed under the Apache License, Version 2.0 (the "License");
 %% you may not use this file except in compliance with the License.
@@ -459,17 +459,17 @@ init([]) ->
                  no_trace
          end,
 
+    Ca = case init:get_argument(connect_all) of
+             {ok, [["false"]]} ->
+                 false;
+             _ ->
+                 true
+         end,
     S = #state{the_locker = start_the_locker(DoTrace),
                trace = T0,
-               the_registrar = start_the_registrar()},
-    S1 = trace_message(S, {init, node()}, []),
-
-    case init:get_argument(connect_all) of
-	{ok, [["false"]]} ->
-	    {ok, S1#state{connect_all = false}};
-	_ ->
-	    {ok, S1#state{connect_all = true}}
-    end.
+               the_registrar = start_the_registrar(),
+               connect_all = Ca},
+    {ok, trace_message(S, {init, node()}, [])}.
 
 %%-----------------------------------------------------------------
 %% Connection algorithm
@@ -2068,23 +2068,17 @@ get_known() ->
     gen_server:call(global_name_server, get_known, infinity).
 
 random_sleep(Times) ->
-    case (Times rem 10) of
-	0 -> erase(random_seed);
-	_ -> ok
-    end,
-    case get(random_seed) of
-	undefined ->
-	    _ = random:seed(erlang:phash2([erlang:node()]),
-			    erlang:monotonic_time(),
-			    erlang:unique_integer()),
-	    ok;
-	_ -> ok
-    end,
+    _ = case Times rem 10 of
+	    0 ->
+		_ = rand:seed(exsplus);
+	    _ ->
+		ok
+	end,
     %% First time 1/4 seconds, then doubling each time up to 8 seconds max.
     Tmax = if Times > 5 -> 8000;
 	      true -> ((1 bsl Times) * 1000) div 8
 	   end,
-    T = random:uniform(Tmax),
+    T = rand:uniform(Tmax),
     ?trace({random_sleep, {me,self()}, {times,Times}, {t,T}, {tmax,Tmax}}),
     receive after T -> ok end.
 
diff --git a/lib/kernel/src/global_group.erl b/lib/kernel/src/global_group.erl
index 848df13c39..e71f83f9d3 100644
--- a/lib/kernel/src/global_group.erl
+++ b/lib/kernel/src/global_group.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %% 
-%% Copyright Ericsson AB 1998-2013. All Rights Reserved.
+%% Copyright Ericsson AB 1998-2015. All Rights Reserved.
 %% 
 %% Licensed under the Apache License, Version 2.0 (the "License");
 %% you may not use this file except in compliance with the License.
@@ -273,7 +273,7 @@ init([]) ->
 	    {ok, #state{publish_type = PT, group_publish_type = PubTpGrp,
 			sync_state = synced, group_name = DefGroupName, 
 			no_contact = lists:sort(DefNodes), 
-			other_grps = DefOther}}
+			other_grps = DefOther, connect_all = Ca}}
     end.
 
 
diff --git a/lib/kernel/src/inet.erl b/lib/kernel/src/inet.erl
index da7f04089d..b573112445 100644
--- a/lib/kernel/src/inet.erl
+++ b/lib/kernel/src/inet.erl
@@ -671,7 +671,7 @@ stats() ->
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 connect_options() ->
     [tos, priority, reuseaddr, keepalive, linger, sndbuf, recbuf, nodelay,
-     header, active, packet, packet_size, buffer, mode, deliver,
+     header, active, packet, packet_size, buffer, mode, deliver, line_delimiter,
      exit_on_close, high_watermark, low_watermark, high_msgq_watermark,
      low_msgq_watermark, send_timeout, send_timeout_close, delay_send, raw,
      show_econnreset].
@@ -692,6 +692,7 @@ connect_options(Opts, Family) ->
     case con_opt(Opts, BaseOpts, connect_options()) of
 	{ok, R} ->
 	    {ok, R#connect_opts {
+		   opts = lists:reverse(R#connect_opts.opts),
 		   ifaddr = translate_ip(R#connect_opts.ifaddr, Family)
 		  }};
 	Error -> Error	    
@@ -721,6 +722,8 @@ con_opt([Opt | Opts], #connect_opts{} = R, As) ->
         {active,N} when is_integer(N), N < 32768, N >= -32768 ->
             NOpts = lists:keydelete(active, 1, R#connect_opts.opts),
             con_opt(Opts, R#connect_opts { opts = [{active,N}|NOpts] }, As);
+	{line_delimiter,C} when is_integer(C), C >= 0, C =< 255 ->
+	    con_add(line_delimiter, C, R, Opts, As);
 	{Name,Val} when is_atom(Name) -> con_add(Name, Val, R, Opts, As);
 	_ -> {error, badarg}
     end;
@@ -760,6 +763,7 @@ listen_options(Opts, Family) ->
     case list_opt(Opts, BaseOpts, listen_options()) of
 	{ok, R} ->
 	    {ok, R#listen_opts {
+		   opts = lists:reverse(R#listen_opts.opts),
 		   ifaddr = translate_ip(R#listen_opts.ifaddr, Family)
 		  }};
 	Error -> Error
@@ -818,6 +822,7 @@ udp_options(Opts, Family) ->
     case udp_opt(Opts, #udp_opts { }, udp_options()) of
 	{ok, R} ->
 	    {ok, R#udp_opts {
+		   opts = lists:reverse(R#udp_opts.opts),
 		   ifaddr = translate_ip(R#udp_opts.ifaddr, Family)
 		  }};
 	Error -> Error
@@ -891,9 +896,12 @@ sctp_options() ->
 sctp_options(Opts, Mod)  ->
     case sctp_opt(Opts, Mod, #sctp_opts{}, sctp_options()) of
 	{ok,#sctp_opts{ifaddr=undefined}=SO} -> 
-	    {ok,SO#sctp_opts{ifaddr=Mod:translate_ip(?SCTP_DEF_IFADDR)}};
-	{ok,_}=OK ->
-	    OK;
+	    {ok,
+	     SO#sctp_opts{
+	       opts=lists:reverse(SO#sctp_opts.opts),
+	       ifaddr=Mod:translate_ip(?SCTP_DEF_IFADDR)}};
+	{ok,SO} ->
+	    {ok,SO#sctp_opts{opts=lists:reverse(SO#sctp_opts.opts)}};
 	Error -> Error
     end.
 
@@ -965,6 +973,8 @@ add_opt(Name, Val, Opts, As) ->
     case lists:member(Name, As) of
 	true ->
 	    case prim_inet:is_sockopt_val(Name, Val) of
+		true when Name =:= raw ->
+		    {ok, [{Name,Val} | Opts]};
 		true ->
 		    Opts1 = lists:keydelete(Name, 1, Opts),
 		    {ok, [{Name,Val} | Opts1]};
diff --git a/lib/kernel/src/inet6_tcp.erl b/lib/kernel/src/inet6_tcp.erl
index 2ea017285c..1978307b3c 100644
--- a/lib/kernel/src/inet6_tcp.erl
+++ b/lib/kernel/src/inet6_tcp.erl
@@ -25,10 +25,29 @@
 -export([controlling_process/2]).
 -export([fdopen/2]).
 
+-export([family/0, mask/2, parse_address/1]).
 -export([getserv/1, getaddr/1, getaddr/2, getaddrs/1, getaddrs/2]).
 
 -include("inet_int.hrl").
 
+%% my address family
+family() -> inet6.
+
+%% Apply netmask on address
+mask({M1,M2,M3,M4,M5,M6,M7,M8}, {IP1,IP2,IP3,IP4,IP5,IP6,IP7,IP8}) ->
+    {M1 band IP1,
+     M2 band IP2,
+     M3 band IP3,
+     M4 band IP4,
+     M5 band IP5,
+     M6 band IP6,
+     M7 band IP7,
+     M8 band IP8 }.
+
+%% Parse address string
+parse_address(Host) ->
+    inet_parse:ipv6strict_address(Host).
+
 %% inet_tcp port lookup
 getserv(Port) when is_integer(Port) -> {ok, Port};
 getserv(Name) when is_atom(Name)    -> inet:getservbyname(Name,tcp).
diff --git a/lib/kernel/src/inet6_tcp_dist.erl b/lib/kernel/src/inet6_tcp_dist.erl
index a74a4916ba..3ab7f269bb 100644
--- a/lib/kernel/src/inet6_tcp_dist.erl
+++ b/lib/kernel/src/inet6_tcp_dist.erl
@@ -24,28 +24,6 @@
 -export([listen/1, accept/1, accept_connection/5,
          setup/5, close/1, select/1, is_node_name/1]).
 
-%% internal exports
-
--export([accept_loop/2,do_accept/6,do_setup/6, getstat/1,tick/1]).
-
--import(error_logger,[error_msg/2]).
-
--include("net_address.hrl").
-
-
-
--define(to_port(Socket, Data, Opts),
-        case inet6_tcp:send(Socket, Data, Opts) of
-            {error, closed} ->
-                self() ! {tcp_closed, Socket},
-                {error, closed};
-            R ->
-                R
-        end).
-
-
--include("dist.hrl").
--include("dist_util.hrl").
 
 %% ------------------------------------------------------------
 %%  Select this protocol based on node name
@@ -53,14 +31,7 @@
 %% ------------------------------------------------------------
 
 select(Node) ->
-    case split_node(atom_to_list(Node), $@, []) of
-        [_, Host] ->
-            case inet:getaddr(Host,inet6) of
-                {ok,_} -> true;
-                _ -> false
-            end;
-        _ -> false
-    end.
+    inet_tcp_dist:gen_select(inet6_tcp, Node).
 
 %% ------------------------------------------------------------
 %% Create the listen socket, i.e. the port that this erlang
@@ -68,59 +39,14 @@ select(Node) ->
 %% ------------------------------------------------------------
 
 listen(Name) ->
-    case inet6_tcp:listen(0, [{active, false}, {packet,2}]) of
-        {ok, Socket} ->
-            TcpAddress = get_tcp_address(Socket),
-            {_,Port} = TcpAddress#net_address.address,
-            case erl_epmd:register_node(Name, Port) of
-                {ok, Creation} ->
-                    {ok, {Socket, TcpAddress, Creation}};
-                Error ->
-                    Error
-            end;
-        Error ->
-            Error
-    end.
+    inet_tcp_dist:gen_listen(inet6_tcp, Name).
 
 %% ------------------------------------------------------------
 %% Accepts new connection attempts from other Erlang nodes.
 %% ------------------------------------------------------------
 
 accept(Listen) ->
-    spawn_opt(?MODULE, accept_loop, [self(), Listen], [link, {priority, max}]).
-
-accept_loop(Kernel, Listen) ->
-    case inet6_tcp:accept(Listen) of
-        {ok, Socket} ->
-            Kernel ! {accept,self(),Socket,inet6,tcp},
-            _ = controller(Kernel, Socket),
-            accept_loop(Kernel, Listen);
-        Error ->
-            exit(Error)
-    end.
-
-controller(Kernel, Socket) ->
-    receive
-        {Kernel, controller, Pid} ->
-            flush_controller(Pid, Socket),
-            inet6_tcp:controlling_process(Socket, Pid),
-            flush_controller(Pid, Socket),
-            Pid ! {self(), controller};
-        {Kernel, unsupported_protocol} ->
-            exit(unsupported_protocol)
-    end.
-
-flush_controller(Pid, Socket) ->
-    receive
-        {tcp, Socket, Data} ->
-            Pid ! {tcp, Socket, Data},
-            flush_controller(Pid, Socket);
-        {tcp_closed, Socket} ->
-            Pid ! {tcp_closed, Socket},
-            flush_controller(Pid, Socket)
-    after 0 ->
-            ok
-    end.
+    inet_tcp_dist:gen_accept(inet6_tcp, Listen).
 
 %% ------------------------------------------------------------
 %% Accepts a new connection attempt from another Erlang node.
@@ -128,85 +54,7 @@ flush_controller(Pid, Socket) ->
 %% ------------------------------------------------------------
 
 accept_connection(AcceptPid, Socket, MyNode, Allowed, SetupTime) ->
-    spawn_opt(?MODULE, do_accept,
-	      [self(), AcceptPid, Socket, MyNode, Allowed, SetupTime],
-	      [link, {priority, max}]).
-
-do_accept(Kernel, AcceptPid, Socket, MyNode, Allowed, SetupTime) ->
-    receive
-        {AcceptPid, controller} ->
-            Timer = dist_util:start_timer(SetupTime),
-            case check_ip(Socket) of
-                true ->
-                    HSData = #hs_data{
-                      kernel_pid = Kernel,
-                      this_node = MyNode,
-                      socket = Socket,
-                      timer = Timer,
-                      this_flags = 0,
-                      allowed = Allowed,
-                      f_send = fun(S,D) -> inet6_tcp:send(S,D) end,
-                      f_recv = fun(S,N,T) -> inet6_tcp:recv(S,N,T) 
-                               end,
-                      f_setopts_pre_nodeup = 
-                      fun(S) ->
-                              inet:setopts(S, 
-                                           [{active, false},
-                                            {packet, 4},
-                                            nodelay()])
-                      end,
-                      f_setopts_post_nodeup = 
-                      fun(S) ->
-                              inet:setopts(S, 
-                                           [{active, true},
-                                            {deliver, port},
-                                            {packet, 4},
-                                            nodelay()])
-                      end,
-                      f_getll = fun(S) ->
-                                        inet:getll(S)
-                                end,
-                      f_address = fun get_remote_id/2,
-                      mf_tick = fun ?MODULE:tick/1,
-                      mf_getstat = fun ?MODULE:getstat/1
-                     },
-                    dist_util:handshake_other_started(HSData);
-                {false,IP} ->
-                    error_msg("** Connection attempt from "
-                              "disallowed IP ~w ** ~n", [IP]),
-                    ?shutdown(no_node)
-            end
-    end.
-
-
-%% we may not always want the nodelay behaviour
-%% for performance reasons
-
-nodelay() ->
-    case application:get_env(kernel, dist_nodelay) of
-        undefined ->
-            {nodelay, true};
-        {ok, true} ->
-            {nodelay, true};
-        {ok, false} ->
-            {nodelay, false};
-        _ ->
-            {nodelay, true}
-    end.
-            
-
-%% ------------------------------------------------------------
-%% Get remote information about a Socket.
-%% ------------------------------------------------------------
-
-get_remote_id(Socket, Node) ->
-    {ok, Address} = inet:peername(Socket),
-    [_, Host] = split_node(atom_to_list(Node), $@, []),
-    #net_address {
-                  address = Address,
-                  host = Host,
-                  protocol = tcp,
-                  family = inet6 }.
+    inet_tcp_dist:gen_accept_connection(inet6_tcp, AcceptPid, Socket, MyNode, Allowed, SetupTime).
 
 %% ------------------------------------------------------------
 %% Setup a new connection to another Erlang node.
@@ -214,214 +62,13 @@ get_remote_id(Socket, Node) ->
 %% ------------------------------------------------------------
 
 setup(Node, Type, MyNode, LongOrShortNames,SetupTime) ->
-    spawn_opt(?MODULE, do_setup, 
-	      [self(), Node, Type, MyNode, LongOrShortNames, SetupTime],
-	      [link, {priority, max}]).
-
-do_setup(Kernel, Node, Type, MyNode, LongOrShortNames,SetupTime) ->
-    ?trace("~p~n",[{?MODULE,self(),setup,Node}]),
-    [Name, Address] = splitnode(Node, LongOrShortNames),
-    case inet:getaddr(Address, inet6) of
-        {ok, Ip} ->
-            Timer = dist_util:start_timer(SetupTime),
-            case erl_epmd:port_please(Name, Ip) of
-                {port, TcpPort, Version} ->
-                    ?trace("port_please(~p) -> version ~p~n", 
-                           [Node,Version]),
-                    dist_util:reset_timer(Timer),
-                    case inet6_tcp:connect(Ip, TcpPort, 
-                                          [{active, false}, 
-                                           {packet,2}]) of
-                        {ok, Socket} ->
-                            HSData = #hs_data{
-                              kernel_pid = Kernel,
-                              other_node = Node,
-                              this_node = MyNode,
-                              socket = Socket,
-                              timer = Timer,
-                              this_flags = 0,
-                              other_version = Version,
-			      f_send = fun inet6_tcp:send/2,
-			      f_recv = fun inet6_tcp:recv/3,
-                              f_setopts_pre_nodeup = 
-                              fun(S) ->
-                                      inet:setopts
-                                        (S, 
-                                         [{active, false},
-                                          {packet, 4},
-                                          nodelay()])
-                              end,
-                              f_setopts_post_nodeup = 
-                              fun(S) ->
-                                      inet:setopts
-                                        (S, 
-                                         [{active, true},
-                                          {deliver, port},
-                                          {packet, 4},
-                                          nodelay()])
-                              end,
-			      f_getll = fun inet:getll/1,
-                              f_address = 
-                              fun(_,_) ->
-                                      #net_address {
-                                   address = {Ip,TcpPort},
-                                   host = Address,
-                                   protocol = tcp,
-                                   family = inet6}
-                              end,
-			      mf_tick = fun ?MODULE:tick/1,
-			      mf_getstat = fun ?MODULE:getstat/1,
-			      request_type = Type
-                             },
-                            dist_util:handshake_we_started(HSData);
-                        _ ->
-                            %% Other Node may have closed since 
-                            %% port_please !
-                            ?trace("other node (~p) "
-                                   "closed since port_please.~n", 
-                                   [Node]),
-                            ?shutdown(Node)
-                    end;
-                _ ->
-                    ?trace("port_please (~p) "
-                           "failed.~n", [Node]),
-                    ?shutdown(Node)
-            end;
-        __Other ->
-            ?trace("inet_getaddr(~p) "
-                   "failed (~p).~n", [Node,__Other]),
-            ?shutdown(Node)
-    end.
+    inet_tcp_dist:gen_setup(inet6_tcp, Node, Type, MyNode, LongOrShortNames, SetupTime).
 
 %%
 %% Close a socket.
 %%
 close(Socket) ->
     inet6_tcp:close(Socket).
-
-
-%% If Node is illegal terminate the connection setup!!
-splitnode(Node, LongOrShortNames) ->
-    case split_node(atom_to_list(Node), $@, []) of
-        [Name|Tail] when Tail =/= [] ->
-            Host = lists:append(Tail),
-            case split_node(Host, $., []) of
-                [_] when LongOrShortNames =:= longnames ->
-                    case inet_parse:ipv6strict_address(Host) of
-                        {ok, _} ->
-                            [Name, Host];
-                        _ ->
-                            error_msg("** System running to use "
-                                      "fully qualified "
-                                      "hostnames **~n"
-                                      "** Hostname ~s is illegal **~n",
-                                      [Host]),
-                            ?shutdown(Node)
-                    end;
-                L when length(L) > 1, LongOrShortNames =:= shortnames ->
-                    error_msg("** System NOT running to use fully qualified "
-                              "hostnames **~n"
-                              "** Hostname ~s is illegal **~n",
-                              [Host]),
-                    ?shutdown(Node);
-                _ ->
-                    [Name, Host]
-            end;
-        [_] ->
-            error_msg("** Nodename ~p illegal, no '@' character **~n",
-                      [Node]),
-            ?shutdown(Node);
-        _ ->
-            error_msg("** Nodename ~p illegal **~n", [Node]),
-            ?shutdown(Node)
-    end.
-
-split_node([Chr|T], Chr, Ack) -> [lists:reverse(Ack)|split_node(T, Chr, [])];
-split_node([H|T], Chr, Ack)   -> split_node(T, Chr, [H|Ack]);
-split_node([], _, Ack)        -> [lists:reverse(Ack)].
-
-%% ------------------------------------------------------------
-%% Fetch local information about a Socket.
-%% ------------------------------------------------------------
-get_tcp_address(Socket) ->
-    {ok, Address} = inet:sockname(Socket),
-    {ok, Host} = inet:gethostname(),
-    #net_address {
-                  address = Address,
-                  host = Host,
-                  protocol = tcp,
-                  family = inet6
-                 }.
-
-%% ------------------------------------------------------------
-%% Do only accept new connection attempts from nodes at our
-%% own LAN, if the check_ip environment parameter is true.
-%% ------------------------------------------------------------
-check_ip(Socket) ->
-    case application:get_env(check_ip) of
-        {ok, true} ->
-            case get_ifs(Socket) of
-                {ok, IFs, IP} ->
-                    check_ip(IFs, IP);
-                _ ->
-                    ?shutdown(no_node)
-            end;
-        _ ->
-            true
-    end.
-
-get_ifs(Socket) ->
-    case inet:peername(Socket) of
-        {ok, {IP, _}} ->
-            case inet:getif(Socket) of
-                {ok, IFs} -> {ok, IFs, IP};
-                Error     -> Error
-            end;
-        Error ->
-            Error
-    end.
-
-check_ip([{OwnIP, _, Netmask}|IFs], PeerIP) ->
-    case {mask(Netmask, PeerIP), mask(Netmask, OwnIP)} of
-        {M, M} -> true;
-        _      -> check_ip(IFs, PeerIP)
-    end;
-check_ip([], PeerIP) ->
-    {false, PeerIP}.
     
-mask({M1,M2,M3,M4,M5,M6,M7,M8}, {IP1,IP2,IP3,IP4,IP5,IP6,IP7,IP8}) ->
-    {M1 band IP1,
-     M2 band IP2,
-     M3 band IP3,
-     M4 band IP4,
-     M5 band IP5,
-     M6 band IP6,
-     M7 band IP7,
-     M8 band IP8 }.
-
 is_node_name(Node) when is_atom(Node) ->
-    case split_node(atom_to_list(Node), $@, []) of
-        [_,_Host] -> true;
-        _ -> false
-    end;
-is_node_name(_Node) ->
-    false.
-tick(Sock) ->
-    ?to_port(Sock,[],[force]).
-getstat(Socket) ->
-    case inet:getstat(Socket, [recv_cnt, send_cnt, send_pend]) of
-        {ok, Stat} ->
-            split_stat(Stat,0,0,0);
-        Error ->
-            Error
-    end.
-
-split_stat([{recv_cnt, R}|Stat], _, W, P) ->
-    split_stat(Stat, R, W, P);
-split_stat([{send_cnt, W}|Stat], R, _, P) ->
-    split_stat(Stat, R, W, P);
-split_stat([{send_pend, P}|Stat], R, W, _) ->
-    split_stat(Stat, R, W, P);
-split_stat([], R, W, P) ->
-    {ok, R, W, P}.
-
+    inet_tcp_dist:is_node_name(Node).
diff --git a/lib/kernel/src/inet_config.erl b/lib/kernel/src/inet_config.erl
index 803fae846e..a0d5344f11 100644
--- a/lib/kernel/src/inet_config.erl
+++ b/lib/kernel/src/inet_config.erl
@@ -188,9 +188,6 @@ do_load_resolv({win32,Type}, longnames) ->
     win32_load_from_registry(Type),
     inet_db:set_lookup([native]);
 
-do_load_resolv({ose,_}, _) ->
-    inet_db:set_lookup([file]);
-
 do_load_resolv(_, _) ->
     inet_db:set_lookup([native]).
 
diff --git a/lib/kernel/src/inet_db.erl b/lib/kernel/src/inet_db.erl
index 1621efbfd7..108a803610 100644
--- a/lib/kernel/src/inet_db.erl
+++ b/lib/kernel/src/inet_db.erl
@@ -633,20 +633,22 @@ make_hostent(Name, Datas, Aliases, Type) ->
 
 hostent_by_domain(Domain, Type) ->
     ?dbg("hostent_by_domain: ~p~n", [Domain]),
-    hostent_by_domain(stripdot(Domain), [], Type).
+    hostent_by_domain(stripdot(Domain), [], [], Type).
 
-hostent_by_domain(Domain, Aliases, Type) ->
+hostent_by_domain(Domain, Aliases, LAliases, Type) ->
     case lookup_type(Domain, Type) of
 	[] ->
 	    case lookup_cname(Domain) of
 		[] ->  
 		    {error, nxdomain};
 		[CName | _] ->
-		    case lists:member(CName, [Domain | Aliases]) of
+		    LDomain = tolower(Domain),
+		    case lists:member(CName, [LDomain | LAliases]) of
                         true -> 
 			    {error, nxdomain};
                         false ->
-			    hostent_by_domain(CName, [Domain | Aliases], Type)
+			    hostent_by_domain(CName, [Domain | Aliases],
+					      [LDomain | LAliases], Type)
 		    end
 	    end;
 	Addrs ->
@@ -671,24 +673,26 @@ lookup_rr(Domain, Class, Type) ->
 %% match data field directly and cache RRs.
 %%
 res_hostent_by_domain(Domain, Type, Rec) ->
-    res_cache_answer(Rec),
-    RRs = Rec#dns_rec.anlist,
+    RRs = lists:map(fun lower_rr/1, Rec#dns_rec.anlist),
+    res_cache_answer(Rec#dns_rec{anlist = RRs}),
     ?dbg("res_hostent_by_domain: ~p - ~p~n", [Domain, RRs]),
-    res_hostent_by_domain(stripdot(Domain), [], Type, RRs).
+    res_hostent_by_domain(stripdot(Domain), [], [], Type, RRs).
 
-res_hostent_by_domain(Domain, Aliases, Type, RRs) ->
-    case res_lookup_type(Domain, Type, RRs) of
+res_hostent_by_domain(Domain, Aliases, LAliases, Type, RRs) ->
+    LDomain = tolower(Domain),
+    case res_lookup_type(LDomain, Type, RRs) of
 	[] ->
-	    case res_lookup_type(Domain, ?S_CNAME, RRs) of
+	    case res_lookup_type(LDomain, ?S_CNAME, RRs) of
 		[] ->  
 		    {error, nxdomain};
 		[CName | _] ->
-		    case lists:member(CName, [Domain | Aliases]) of
+		    case lists:member(tolower(CName), [LDomain | LAliases]) of
 			true -> 
 			    {error, nxdomain};
 			false ->
 			    res_hostent_by_domain(CName, [Domain | Aliases],
-						  Type, RRs)
+						  [LDomain | LAliases], Type,
+						  RRs)
 		    end
 	    end;
 	Addrs ->
@@ -721,7 +725,8 @@ gethostbyaddr(IP) ->
 %%
 res_gethostbyaddr(IP, Rec) ->
     {ok, {IP1, HType, HLen}} = dnt(IP),
-    res_cache_answer(Rec),
+    RRs = lists:map(fun lower_rr/1, Rec#dns_rec.anlist),
+    res_cache_answer(Rec#dns_rec{anlist = RRs}),
     ent_gethostbyaddr(Rec#dns_rec.anlist, IP1, HType, HLen).
 
 ent_gethostbyaddr(RRs, IP, AddrType, Length) ->
@@ -1378,7 +1383,7 @@ times() ->
 %% lookup and remove old entries
 
 do_lookup_rr(Domain, Class, Type) ->
-    match_rr(#dns_rr{domain = Domain, class = Class,type = Type,
+    match_rr(#dns_rr{domain = tolower(Domain), class = Class,type = Type,
 		     cnt = '_', tm = '_', ttl = '_',
 		     bm = '_', func = '_', data = '_'}).
 
@@ -1400,6 +1405,11 @@ filter_rr([RR | RRs], Time) ->
     [RR | filter_rr(RRs, Time)];
 filter_rr([], _Time) ->  [].
 
+%% Lower case the domain name before storage.
+%%
+lower_rr(#dns_rr{domain=Domain}=RR) when is_list(Domain) ->
+    RR#dns_rr { domain = tolower(Domain) };
+lower_rr(RR) -> RR.
 
 %%
 %% Case fold upper-case to lower-case according to RFC 4343
diff --git a/lib/kernel/src/inet_dns_record_adts.pl b/lib/kernel/src/inet_dns_record_adts.pl
index 657d2b9d35..6d719d836e 100644
--- a/lib/kernel/src/inet_dns_record_adts.pl
+++ b/lib/kernel/src/inet_dns_record_adts.pl
@@ -57,7 +57,8 @@ while(<DATA>) {
 
 $" = ',';
 $\ = "\n";
-while( my ($Name, $r) = each(%Names)) {
+foreach my $Name (sort keys %Names) {
+    my $r = $Names{$Name};
     # Create substitutions for this Name
     my ($Record, @Fields) = @{ $r };
     my @FieldMatchValues;
@@ -110,7 +111,8 @@ while( my ($Name, $r) = each(%Names)) {
 for my $i ( 0 .. $#INDEX ) {
     my $line = $INDEX[$i];
     if ($line =~ s/^[*]//) {
-	while( my ($Name, $r) = each(%Names)) {
+	foreach my $Name (sort keys %Names) {
+	    my $r = $Names{$Name};
 	    my ($Record) = @{ $r };
 	    $_ = $line;
 	    s/Name\b/$Name/g;
diff --git a/lib/kernel/src/inet_int.hrl b/lib/kernel/src/inet_int.hrl
index bfe4c9ec8c..e7c6cf8ae2 100644
--- a/lib/kernel/src/inet_int.hrl
+++ b/lib/kernel/src/inet_int.hrl
@@ -149,6 +149,7 @@
 -define(INET_LOPT_MSGQ_LOWTRMRK,  37).
 -define(INET_LOPT_NETNS,          38).
 -define(INET_LOPT_TCP_SHOW_ECONNRESET, 39).
+-define(INET_LOPT_LINE_DELIM,     40).
 % Specific SCTP options: separate range:
 -define(SCTP_OPT_RTOINFO,	 	100).
 -define(SCTP_OPT_ASSOCINFO,	 	101).
diff --git a/lib/kernel/src/inet_tcp.erl b/lib/kernel/src/inet_tcp.erl
index b5c758c02c..f551af9709 100644
--- a/lib/kernel/src/inet_tcp.erl
+++ b/lib/kernel/src/inet_tcp.erl
@@ -27,11 +27,25 @@
 -export([controlling_process/2]).
 -export([fdopen/2]).
 
+-export([family/0, mask/2, parse_address/1]).
 -export([getserv/1, getaddr/1, getaddr/2, getaddrs/1, getaddrs/2]).
 
-
 -include("inet_int.hrl").
 
+%% my address family
+family() -> inet.
+
+%% Apply netmask on address
+mask({M1,M2,M3,M4}, {IP1,IP2,IP3,IP4}) ->
+    {M1 band IP1,
+     M2 band IP2,
+     M3 band IP3,
+     M4 band IP4}.
+
+%% Parse address string
+parse_address(Host) ->
+    inet_parse:ipv4strict_address(Host).
+
 %% inet_tcp port lookup
 getserv(Port) when is_integer(Port) -> {ok, Port};
 getserv(Name) when is_atom(Name)    -> inet:getservbyname(Name,tcp).
diff --git a/lib/kernel/src/inet_tcp_dist.erl b/lib/kernel/src/inet_tcp_dist.erl
index 1bdc1c9ed8..64b28bb49b 100644
--- a/lib/kernel/src/inet_tcp_dist.erl
+++ b/lib/kernel/src/inet_tcp_dist.erl
@@ -24,9 +24,13 @@
 -export([listen/1, accept/1, accept_connection/5,
 	 setup/5, close/1, select/1, is_node_name/1]).
 
+%% Generalized dist API
+-export([gen_listen/2, gen_accept/2, gen_accept_connection/6,
+	 gen_setup/6, gen_select/2]).
+
 %% internal exports
 
--export([accept_loop/2,do_accept/6,do_setup/6,getstat/1,tick/1]).
+-export([accept_loop/3,do_accept/7,do_setup/7,getstat/1]).
 
 -import(error_logger,[error_msg/2]).
 
@@ -34,15 +38,6 @@
 
 
 
--define(to_port(Socket, Data, Opts),
-	case inet_tcp:send(Socket, Data, Opts) of
-	    {error, closed} ->
-		self() ! {tcp_closed, Socket},
-	        {error, closed};
-	    R ->
-	        R
-        end).
-
 
 -include("dist.hrl").
 -include("dist_util.hrl").
@@ -53,8 +48,15 @@
 %% ------------------------------------------------------------
 
 select(Node) ->
+    gen_select(inet_tcp, Node).
+
+gen_select(Driver, Node) ->
     case split_node(atom_to_list(Node), $@, []) of
-	[_,_Host] -> true;
+	[_, Host] ->
+	    case inet:getaddr(Host, Driver:family()) of
+                {ok,_} -> true;
+                _ -> false
+            end;
 	_ -> false
     end.
 
@@ -64,9 +66,12 @@ select(Node) ->
 %% ------------------------------------------------------------
 
 listen(Name) ->
-    case do_listen([{active, false}, {packet,2}, {reuseaddr, true}]) of
+    gen_listen(inet_tcp, Name).
+
+gen_listen(Driver, Name) ->
+    case do_listen(Driver, [{active, false}, {packet,2}, {reuseaddr, true}]) of
 	{ok, Socket} ->
-	    TcpAddress = get_tcp_address(Socket),
+	    TcpAddress = get_tcp_address(Driver, Socket),
 	    {_,Port} = TcpAddress#net_address.address,
 	    case erl_epmd:register_node(Name, Port) of
 		{ok, Creation} ->
@@ -78,7 +83,7 @@ listen(Name) ->
 	    Error
     end.
 
-do_listen(Options) ->
+do_listen(Driver, Options) ->
     {First,Last} = case application:get_env(kernel,inet_dist_listen_min) of
 		       {ok,N} when is_integer(N) ->
 			   case application:get_env(kernel,
@@ -91,14 +96,14 @@ do_listen(Options) ->
 		       _ ->
 			   {0,0}
 		   end,
-    do_listen(First, Last, listen_options([{backlog,128}|Options])).
+    do_listen(Driver, First, Last, listen_options([{backlog,128}|Options])).
 
-do_listen(First,Last,_) when First > Last ->
+do_listen(_Driver, First,Last,_) when First > Last ->
     {error,eaddrinuse};
-do_listen(First,Last,Options) ->
-    case inet_tcp:listen(First, Options) of
+do_listen(Driver, First,Last,Options) ->
+    case Driver:listen(First, Options) of
 	{error, eaddrinuse} ->
-	    do_listen(First+1,Last,Options);
+	    do_listen(Driver, First+1,Last,Options);
 	Other ->
 	    Other
     end.
@@ -124,23 +129,26 @@ listen_options(Opts0) ->
 %% ------------------------------------------------------------
 
 accept(Listen) ->
-    spawn_opt(?MODULE, accept_loop, [self(), Listen], [link, {priority, max}]).
+    gen_accept(inet_tcp, Listen).
 
-accept_loop(Kernel, Listen) ->
-    case inet_tcp:accept(Listen) of
+gen_accept(Driver, Listen) ->
+    spawn_opt(?MODULE, accept_loop, [Driver, self(), Listen], [link, {priority, max}]).
+
+accept_loop(Driver, Kernel, Listen) ->
+    case Driver:accept(Listen) of
 	{ok, Socket} ->
-	    Kernel ! {accept,self(),Socket,inet,tcp},
-	    _ = controller(Kernel, Socket),
-	    accept_loop(Kernel, Listen);
+	    Kernel ! {accept,self(),Socket,Driver:family(),tcp},
+	    _ = controller(Driver, Kernel, Socket),
+	    accept_loop(Driver, Kernel, Listen);
 	Error ->
 	    exit(Error)
     end.
 
-controller(Kernel, Socket) ->
+controller(Driver, Kernel, Socket) ->
     receive
 	{Kernel, controller, Pid} ->
 	    flush_controller(Pid, Socket),
-	    inet_tcp:controlling_process(Socket, Pid),
+	    Driver:controlling_process(Socket, Pid),
 	    flush_controller(Pid, Socket),
 	    Pid ! {self(), controller};
 	{Kernel, unsupported_protocol} ->
@@ -165,15 +173,18 @@ flush_controller(Pid, Socket) ->
 %% ------------------------------------------------------------
 
 accept_connection(AcceptPid, Socket, MyNode, Allowed, SetupTime) ->
+    gen_accept_connection(inet_tcp, AcceptPid, Socket, MyNode, Allowed, SetupTime).
+
+gen_accept_connection(Driver, AcceptPid, Socket, MyNode, Allowed, SetupTime) ->
     spawn_opt(?MODULE, do_accept,
-	      [self(), AcceptPid, Socket, MyNode, Allowed, SetupTime],
+	      [Driver, self(), AcceptPid, Socket, MyNode, Allowed, SetupTime],
 	      [link, {priority, max}]).
 
-do_accept(Kernel, AcceptPid, Socket, MyNode, Allowed, SetupTime) ->
+do_accept(Driver, Kernel, AcceptPid, Socket, MyNode, Allowed, SetupTime) ->
     receive
 	{AcceptPid, controller} ->
 	    Timer = dist_util:start_timer(SetupTime),
-	    case check_ip(Socket) of
+	    case check_ip(Driver, Socket) of
 		true ->
 		    HSData = #hs_data{
 		      kernel_pid = Kernel,
@@ -182,9 +193,8 @@ do_accept(Kernel, AcceptPid, Socket, MyNode, Allowed, SetupTime) ->
 		      timer = Timer,
 		      this_flags = 0,
 		      allowed = Allowed,
-		      f_send = fun(S,D) -> inet_tcp:send(S,D) end,
-		      f_recv = fun(S,N,T) -> inet_tcp:recv(S,N,T) 
-			       end,
+		      f_send = fun Driver:send/2,
+		      f_recv = fun Driver:recv/3,
 		      f_setopts_pre_nodeup = 
 		      fun(S) ->
 			      inet:setopts(S, 
@@ -203,8 +213,8 @@ do_accept(Kernel, AcceptPid, Socket, MyNode, Allowed, SetupTime) ->
 		      f_getll = fun(S) ->
 					inet:getll(S)
 				end,
-		      f_address = fun get_remote_id/2,
-		      mf_tick = fun ?MODULE:tick/1,
+		      f_address = fun(S, Node) -> get_remote_id(Driver, S, Node) end,
+		      mf_tick = fun(S) -> tick(Driver, S) end,
 		      mf_getstat = fun ?MODULE:getstat/1
 		     },
 		    dist_util:handshake_other_started(HSData);
@@ -235,13 +245,13 @@ nodelay() ->
 %% ------------------------------------------------------------
 %% Get remote information about a Socket.
 %% ------------------------------------------------------------
-get_remote_id(Socket, Node) ->
+get_remote_id(Driver, Socket, Node) ->
     case inet:peername(Socket) of
 	{ok,Address} ->
 	    case split_node(atom_to_list(Node), $@, []) of
 		[_,Host] ->
 		    #net_address{address=Address,host=Host,
-				 protocol=tcp,family=inet};
+				 protocol=tcp,family=Driver:family()};
 		_ ->
 		    %% No '@' or more than one '@' in node name.
 		    ?shutdown(no_node)
@@ -256,14 +266,18 @@ get_remote_id(Socket, Node) ->
 %% ------------------------------------------------------------
 
 setup(Node, Type, MyNode, LongOrShortNames,SetupTime) ->
+    gen_setup(inet_tcp, Node, Type, MyNode, LongOrShortNames, SetupTime).
+
+gen_setup(Driver, Node, Type, MyNode, LongOrShortNames, SetupTime) ->
     spawn_opt(?MODULE, do_setup, 
-	      [self(), Node, Type, MyNode, LongOrShortNames, SetupTime],
+	      [Driver, self(), Node, Type, MyNode, LongOrShortNames, SetupTime],
 	      [link, {priority, max}]).
 
-do_setup(Kernel, Node, Type, MyNode, LongOrShortNames,SetupTime) ->
+do_setup(Driver, Kernel, Node, Type, MyNode, LongOrShortNames, SetupTime) ->
     ?trace("~p~n",[{inet_tcp_dist,self(),setup,Node}]),
-    [Name, Address] = splitnode(Node, LongOrShortNames),
-    case inet:getaddr(Address, inet) of
+    [Name, Address] = splitnode(Driver, Node, LongOrShortNames),
+    AddressFamily = Driver:family(),
+    case inet:getaddr(Address, AddressFamily) of
 	{ok, Ip} ->
 	    Timer = dist_util:start_timer(SetupTime),
 	    case erl_epmd:port_please(Name, Ip) of
@@ -272,7 +286,7 @@ do_setup(Kernel, Node, Type, MyNode, LongOrShortNames,SetupTime) ->
 			   [Node,Version]),
 		    dist_util:reset_timer(Timer),
 		    case
-			inet_tcp:connect(
+			Driver:connect(
 			  Ip, TcpPort,
 			  connect_options([{active, false}, {packet, 2}]))
 		    of
@@ -285,8 +299,8 @@ do_setup(Kernel, Node, Type, MyNode, LongOrShortNames,SetupTime) ->
 			      timer = Timer,
 			      this_flags = 0,
 			      other_version = Version,
-			      f_send = fun inet_tcp:send/2,
-			      f_recv = fun inet_tcp:recv/3,
+			      f_send = fun Driver:send/2,
+			      f_recv = fun Driver:recv/3,
 			      f_setopts_pre_nodeup = 
 			      fun(S) ->
 				      inet:setopts
@@ -311,9 +325,9 @@ do_setup(Kernel, Node, Type, MyNode, LongOrShortNames,SetupTime) ->
 				   address = {Ip,TcpPort},
 				   host = Address,
 				   protocol = tcp,
-				   family = inet}
+				   family = AddressFamily}
 			      end,
-			      mf_tick = fun ?MODULE:tick/1,
+			      mf_tick = fun(S) -> tick(Driver, S) end,
 			      mf_getstat = fun ?MODULE:getstat/1,
 			      request_type = Type
 			     },
@@ -353,18 +367,23 @@ close(Socket) ->
 
 
 %% If Node is illegal terminate the connection setup!!
-splitnode(Node, LongOrShortNames) ->
+splitnode(Driver, Node, LongOrShortNames) ->
     case split_node(atom_to_list(Node), $@, []) of
 	[Name|Tail] when Tail =/= [] ->
 	    Host = lists:append(Tail),
 	    case split_node(Host, $., []) of
 		[_] when LongOrShortNames =:= longnames ->
-		    error_msg("** System running to use "
-			      "fully qualified "
-			      "hostnames **~n"
-			      "** Hostname ~s is illegal **~n",
-			      [Host]),
-		    ?shutdown(Node);
+                    case Driver:parse_address(Host) of
+                        {ok, _} ->
+                            [Name, Host];
+                        _ ->
+                            error_msg("** System running to use "
+                                      "fully qualified "
+                                      "hostnames **~n"
+                                      "** Hostname ~s is illegal **~n",
+                                      [Host]),
+                            ?shutdown(Node)
+                    end;
 		L when length(L) > 1, LongOrShortNames =:= shortnames ->
 		    error_msg("** System NOT running to use fully qualified "
 			      "hostnames **~n"
@@ -390,26 +409,26 @@ split_node([], _, Ack)        -> [lists:reverse(Ack)].
 %% ------------------------------------------------------------
 %% Fetch local information about a Socket.
 %% ------------------------------------------------------------
-get_tcp_address(Socket) ->
+get_tcp_address(Driver, Socket) ->
     {ok, Address} = inet:sockname(Socket),
     {ok, Host} = inet:gethostname(),
     #net_address {
 		  address = Address,
 		  host = Host,
 		  protocol = tcp,
-		  family = inet
+		  family = Driver:family()
 		 }.
 
 %% ------------------------------------------------------------
 %% Do only accept new connection attempts from nodes at our
 %% own LAN, if the check_ip environment parameter is true.
 %% ------------------------------------------------------------
-check_ip(Socket) ->
+check_ip(Driver, Socket) ->
     case application:get_env(check_ip) of
 	{ok, true} ->
 	    case get_ifs(Socket) of
 		{ok, IFs, IP} ->
-		    check_ip(IFs, IP);
+		    check_ip(Driver, IFs, IP);
 		_ ->
 		    ?shutdown(no_node)
 	    end;
@@ -428,20 +447,14 @@ get_ifs(Socket) ->
 	    Error
     end.
 
-check_ip([{OwnIP, _, Netmask}|IFs], PeerIP) ->
-    case {mask(Netmask, PeerIP), mask(Netmask, OwnIP)} of
+check_ip(Driver, [{OwnIP, _, Netmask}|IFs], PeerIP) ->
+    case {Driver:mask(Netmask, PeerIP), Driver:mask(Netmask, OwnIP)} of
 	{M, M} -> true;
-	_      -> check_ip(IFs, PeerIP)
+	_      -> check_ip(Driver, IFs, PeerIP)
     end;
-check_ip([], PeerIP) ->
+check_ip(_Driver, [], PeerIP) ->
     {false, PeerIP}.
     
-mask({M1,M2,M3,M4}, {IP1,IP2,IP3,IP4}) ->
-    {M1 band IP1,
-     M2 band IP2,
-     M3 band IP3,
-     M4 band IP4}.
-
 is_node_name(Node) when is_atom(Node) ->
     case split_node(atom_to_list(Node), $@, []) of
 	[_, _Host] -> true;
@@ -450,8 +463,14 @@ is_node_name(Node) when is_atom(Node) ->
 is_node_name(_Node) ->
     false.
 
-tick(Sock) ->
-    ?to_port(Sock,[],[force]).
+tick(Driver, Socket) ->
+    case Driver:send(Socket, [], [force]) of
+	{error, closed} ->
+	    self() ! {tcp_closed, Socket},
+	    {error, closed};
+	R ->
+	    R
+    end.
 
 getstat(Socket) ->
     case inet:getstat(Socket, [recv_cnt, send_cnt, send_pend]) of
diff --git a/lib/kernel/src/kernel.app.src b/lib/kernel/src/kernel.app.src
index c9327e4f31..b5555ca1a5 100644
--- a/lib/kernel/src/kernel.app.src
+++ b/lib/kernel/src/kernel.app.src
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %% 
-%% Copyright Ericsson AB 1996-2013. All Rights Reserved.
+%% Copyright Ericsson AB 1996-2015. All Rights Reserved.
 %% 
 %% Licensed under the Apache License, Version 2.0 (the "License");
 %% you may not use this file except in compliance with the License.
@@ -116,6 +116,6 @@
   {applications, []},
   {env, [{error_logger, tty}]},
   {mod, {kernel, []}},
-  {runtime_dependencies, ["erts-7.0", "stdlib-2.5", "sasl-2.4"]}
+  {runtime_dependencies, ["erts-7.0", "stdlib-2.6", "sasl-2.6"]}
  ]
 }.
diff --git a/lib/kernel/src/kernel.appup.src b/lib/kernel/src/kernel.appup.src
index 701aafc717..860d3640d0 100644
--- a/lib/kernel/src/kernel.appup.src
+++ b/lib/kernel/src/kernel.appup.src
@@ -18,7 +18,9 @@
 %% %CopyrightEnd%
 {"%VSN%",
  %% Up from - max one major revision back
- [{<<"3\\.[0-2](\\.[0-9]+)*">>,[restart_new_emulator]}], % OTP-17
+ [{<<"4\\.[0-1](\\.[0-9]+)*">>,[restart_new_emulator]},  % OTP-18.*
+  {<<"3\\.[0-2](\\.[0-9]+)*">>,[restart_new_emulator]}], % OTP-17
  %% Down to - max one major revision back
- [{<<"3\\.[0-2](\\.[0-9]+)*">>,[restart_new_emulator]}]  % OTP-17
+ [{<<"4\\.[0-1](\\.[0-9]+)*">>,[restart_new_emulator]},  % OTP-18.*
+  {<<"3\\.[0-2](\\.[0-9]+)*">>,[restart_new_emulator]}]  % OTP-17
 }.
diff --git a/lib/kernel/src/os.erl b/lib/kernel/src/os.erl
index 3330b38d84..0022959c11 100644
--- a/lib/kernel/src/os.erl
+++ b/lib/kernel/src/os.erl
@@ -93,7 +93,7 @@ unsetenv(_) ->
 %%% End of BIFs
 
 -spec type() -> {Osfamily, Osname} when
-      Osfamily :: unix | win32 | ose,
+      Osfamily :: unix | win32,
       Osname :: atom().
 
 type() ->
@@ -212,174 +212,33 @@ extensions() ->
       Command :: atom() | io_lib:chars().
 cmd(Cmd) ->
     validate(Cmd),
-    Bytes = case type() of
-		{unix, _} ->
-		    unix_cmd(Cmd);
-		{win32, Wtype} ->
-		    Command0 = case {os:getenv("COMSPEC"),Wtype} of
-				  {false,windows} -> lists:concat(["command.com /c", Cmd]);
-				  {false,_} -> lists:concat(["cmd /c", Cmd]);
-				  {Cspec,_} -> lists:concat([Cspec," /c",Cmd])
-			      end,
-		    %% open_port/2 awaits string() in Command, but io_lib:chars() can be
-		    %% deep lists according to io_lib module description.
-		    Command = lists:flatten(Command0),
-		    Port = open_port({spawn, Command}, [stream, in, eof, hide]),
-		    get_data(Port, [])
-	    end,
-    String = unicode:characters_to_list(list_to_binary(Bytes)),
+    {SpawnCmd, SpawnOpts, SpawnInput} = mk_cmd(os:type(), Cmd),
+    Port = open_port({spawn, SpawnCmd}, [binary, stderr_to_stdout,
+                                         stream, in, eof, hide | SpawnOpts]),
+    true = port_command(Port, SpawnInput),
+    Bytes = get_data(Port, []),
+    String = unicode:characters_to_list(Bytes),
     if  %% Convert to unicode list if possible otherwise return bytes
 	is_list(String) -> String;
-	true -> Bytes
+	true -> binary_to_list(Bytes)
     end.
 
-unix_cmd(Cmd) ->
-    Tag = make_ref(),
-    {Pid,Mref} = erlang:spawn_monitor(
-		   fun() ->
-			   process_flag(trap_exit, true),
-			   Port = start_port(),
-			   erlang:port_command(Port, mk_cmd(Cmd)),
-			   exit({Tag,unix_get_data(Port)})
-		   end),
-    receive
-	{'DOWN',Mref,_,Pid,{Tag,Result}} ->
-	    Result;
-	{'DOWN',Mref,_,Pid,Reason} ->
-	    exit(Reason)
-    end.
-
-%% The -s flag implies that only the positional parameters are set,
-%% and the commands are read from standard input. We set the
-%% $1 parameter for easy identification of the resident shell.
-%%
--define(ROOT,          "/").
--define(ROOT_ANDROID,  "/system").
--define(SHELL, "bin/sh -s unix:cmd 2>&1").
--define(PORT_CREATOR_NAME, os_cmd_port_creator).
-
-%%
-%% Serializing open_port through a process to avoid smp lock contention
-%% when many concurrent os:cmd() want to do vfork (OTP-7890).
-%%
--spec start_port() -> port().
-start_port() ->
-    Ref = make_ref(),
-    Request = {Ref,self()},
-    {Pid, Mon} = case whereis(?PORT_CREATOR_NAME) of
-		     undefined ->
-			 spawn_monitor(fun() ->
-					       start_port_srv(Request)
-				       end);
-		     P ->
-			 P ! Request,
-			 M = erlang:monitor(process, P),
-			 {P, M}
-		 end,
-    receive
-	{Ref, Port} when is_port(Port) ->
-	    erlang:demonitor(Mon, [flush]),
-	    Port;
-	{Ref, Error} ->
-	    erlang:demonitor(Mon, [flush]),
-	    exit(Error);
-	{'DOWN', Mon, process, Pid, _Reason} ->
-	    start_port()
-    end.
-
-start_port_srv(Request) ->
-    %% We don't want a group leader of some random application. Use
-    %% kernel_sup's group leader.
-    {group_leader, GL} = process_info(whereis(kernel_sup),
-				      group_leader),
-    true = group_leader(GL, self()),
-    process_flag(trap_exit, true),
-    StayAlive = try register(?PORT_CREATOR_NAME, self())
-		catch
-		    error:_ -> false
-		end,
-    start_port_srv_handle(Request),
-    case StayAlive of
-	true -> start_port_srv_loop();
-	false -> exiting
-    end.
-
-start_port_srv_handle({Ref,Client}) ->
-    Path  = case lists:reverse(erlang:system_info(system_architecture)) of
-      % androideabi
-      "ibaediordna" ++ _ -> filename:join([?ROOT_ANDROID, ?SHELL]);
-      _ -> filename:join([?ROOT, ?SHELL])
-    end,
-    Reply = try open_port({spawn, Path},[stream]) of
-		Port when is_port(Port) ->
-		    (catch port_connect(Port, Client)),
-		    unlink(Port),
-		    Port
-	    catch
-		error:Reason ->
-		    {Reason,erlang:get_stacktrace()}
-	    end,
-    Client ! {Ref,Reply},
-    ok.
-
-start_port_srv_loop() ->
-    receive
-	{Ref, Client} = Request when is_reference(Ref),
-				     is_pid(Client) ->
-	    start_port_srv_handle(Request);
-	_Junk ->
-	    ok
-    end,
-    start_port_srv_loop().
-
-%%
-%%  unix_get_data(Port) -> Result
-%%
-unix_get_data(Port) ->
-    unix_get_data(Port, []).
-
-unix_get_data(Port, Sofar) ->
-    receive
-	{Port,{data, Bytes}} ->
-	    case eot(Bytes) of
-		{done, Last} ->
-		    lists:flatten([Sofar|Last]);
-		more  ->
-		    unix_get_data(Port, [Sofar|Bytes])
-	    end;
-	{'EXIT', Port, _} ->
-	    lists:flatten(Sofar)
-    end.
-
-%%
-%% eot(String) -> more | {done, Result}
-%%
-eot(Bs) ->
-    eot(Bs, []).
-
-eot([4| _Bs], As) ->
-    {done, lists:reverse(As)};
-eot([B| Bs], As) ->
-    eot(Bs, [B| As]);
-eot([], _As) ->
-    more.
-
-%%
-%% mk_cmd(Cmd) -> {ok, ShellCommandString} | {error, ErrorString}
-%%
-%% We do not allow any input to Cmd (hence commands that want
-%% to read from standard input will return immediately).
-%% Standard error is redirected to standard output.
-%%
-%% We use ^D (= EOT = 4) to mark the end of the stream.
-%%
-mk_cmd(Cmd) when is_atom(Cmd) ->		% backward comp.
-    mk_cmd(atom_to_list(Cmd));
-mk_cmd(Cmd) ->
-    %% We insert a new line after the command, in case the command
-    %% contains a comment character.
-    [$(, unicode:characters_to_binary(Cmd), "\n) </dev/null; echo  \"\^D\"\n"].
-
+mk_cmd({win32,Wtype}, Cmd) ->
+    Command = case {os:getenv("COMSPEC"),Wtype} of
+                  {false,windows} -> lists:concat(["command.com /c", Cmd]);
+                  {false,_} -> lists:concat(["cmd /c", Cmd]);
+                  {Cspec,_} -> lists:concat([Cspec," /c",Cmd])
+              end,
+    {Command, [], []};
+mk_cmd(OsType,Cmd) when is_atom(Cmd) ->
+    mk_cmd(OsType, atom_to_list(Cmd));
+mk_cmd(_,Cmd) ->
+    %% Have to send command in like this in order to make sh commands like
+    %% cd and ulimit available
+    {"/bin/sh -s unix:cmd", [out],
+     %% We insert a new line after the command, in case the command
+     %% contains a comment character.
+     ["(", unicode:characters_to_binary(Cmd), "\n); exit\n"]}.
 
 validate(Atom) when is_atom(Atom) ->
     ok;
@@ -397,7 +256,7 @@ validate1([]) ->
 get_data(Port, Sofar) ->
     receive
 	{Port, {data, Bytes}} ->
-	    get_data(Port, [Sofar|Bytes]);
+	    get_data(Port, [Sofar,Bytes]);
 	{Port, eof} ->
 	    Port ! {self(), close},
 	    receive
@@ -410,5 +269,5 @@ get_data(Port, Sofar) ->
 	    after 1 ->				% force context switch
 		    ok
 	    end,
-	    lists:flatten(Sofar)
+	    iolist_to_binary(Sofar)
     end.