Fix dets file corruption issue.

Obtained from:	Hans Bolinder <hasse@erix.ericsson.se>

1 files changed, 77 insertions, 0 deletions

diff --git a/lang/erlang14/files/patch-lib_stdlib_src_dets__v9.erl b/lang/erlang14/files/patch-lib_stdlib_src_dets__v9.erl
new file mode 100644
index 000000000000..fefd4c99f680
--- /dev/null
+++ b/lang/erlang14/files/patch-lib_stdlib_src_dets__v9.erl
@@ -0,0 +1,77 @@
+
+$FreeBSD$
+
+--- lib/stdlib/src/dets_v9.erl.orig	Mon Jul  7 14:17:44 2003
++++ lib/stdlib/src/dets_v9.erl	Fri Dec 26 14:58:33 2003
+@@ -212,7 +212,6 @@
+ -define(FREELIST_POS, 0).
+ -define(CLOSED_PROPERLY_POS, 8).
+ -define(D_POS, 20).
+--define(NO_KEYS_POS, (?D_POS + 16)).
+ 
+ %%% Dets file versions up to 8 are handled in dets_v8. This module
+ %%% handles version 9, introduced in R8.
+@@ -416,7 +415,7 @@
+ 		alloc_part(Head, SegZero, PartPos),
+ 	    {NewHead, InitSegment, [SegPointer]} =
+                 alloc_seg(Head1, SegZero, SegNo, Part),
+-	    {NewHead, InitSegment, [SegPointer, InitArrPart, ArrPartPointer]};
++	    {NewHead, InitSegment, [InitArrPart, SegPointer, ArrPartPointer]};
+ 	Part ->
+             alloc_seg(Head, SegZero, SegNo, Part)
+     end.
+@@ -1222,7 +1221,7 @@
+     %% Note that space for the array parts and the segments has
+     %% already been allocated, but the segments have not been
+     %% initialized on disk.
+-    NoParts = no_parts(Head#head.m),
++    NoParts = no_parts(Head#head.next),
+     %% All parts first, ensured by init_segments/6.
+     Addr = ?BASE + NoParts * 4 * ?SEGPARTSZ,
+     {Head, [{?FSCK_SEGMENT,Addr,Data,0} | L]};
+@@ -1586,7 +1585,11 @@
+     {FLW, FLSize} = free_lists_to_file(H1),
+     FileSize = FreeListsPointer + FLSize + 4,
+     ok = dets_utils:write(H, [FLW | <<FileSize:32>>]),
+-    NoColls = case H1#head.no_collections of
++    FileHeader = file_header(H1, FreeListsPointer, ?CLOSED_PROPERLY),
++    dets_utils:pwrite(H1, [{0, FileHeader}]).
++
++file_header(Head, FreeListsPointer, ClosedProperly) ->
++    NoColls = case Head#head.no_collections of
+ 		  undefined -> [];
+ 		  NC -> NC
+ 	      end,
+@@ -1594,8 +1597,7 @@
+ 		      NoColls, 
+ 		      lists:map(fun(X) -> {X,0} end, lists:seq(4,?MAXBUD-1))),
+     CW = lists:map(fun({_LSz,N}) -> <<N:32>> end, L),
+-    FileHeader = file_header(H1, FreeListsPointer, ?CLOSED_PROPERLY, CW),
+-    dets_utils:pwrite(H1, [{0, FileHeader}]).
++    file_header(Head, FreeListsPointer, ClosedProperly, CW).
+ 
+ file_header(Head, FreeListsPointer, ClosedProperly, NoColls) ->
+     Cookie = ?MAGIC,
+@@ -2356,17 +2358,18 @@
+ update_no_keys(Head, Ws, DeltaObjects, DeltaKeys) ->
+     NoKeys = Head#head.no_keys,
+     NewNoKeys = NoKeys + DeltaKeys,
++    NewNoObject = Head#head.no_objects + DeltaObjects,
++    NewHead = Head#head{no_objects = NewNoObject, no_keys = NewNoKeys},
+     NWs = 
+ 	if 
+-	    NewNoKeys > Head#head.max_no_slots ->
++	    NewNoKeys > NewHead#head.max_no_slots ->
+ 		Ws;
+ 	    NoKeys div ?SEGSZP == NewNoKeys div ?SEGSZP ->
+ 		Ws;
+ 	    true ->
+-		[{?NO_KEYS_POS, <<NewNoKeys:32>>} | Ws]
++                [{0, file_header(NewHead, 0, ?NOT_PROPERLY_CLOSED)} | Ws]
+ 	end,
+-    NewNoObject = Head#head.no_objects + DeltaObjects,
+-    {Head#head{no_objects = NewNoObject, no_keys = NewNoKeys}, NWs}.
++    {NewHead, NWs}.
+ 
+ slot_position(S) ->
+     SegNo = ?SLOT2SEG(S), % S div ?SEGSZP