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[BUG/PRB.] VFP 9.0 FIX - CREATE A NEW COMMAND WINDOW HISTORY FILE BEFORE VISUAL FOXPRO EXITS
January 2024
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CCB
1. BUG:
In vfp9 (and vfp7, vfp8), it will ALWAYS create a new command window history file, and then write data to the file before it exits,
but sometimes the command window history file is an empty file, the content of the command window history file has been lost.
In VFP Advanced, if the command window history file exists, it will open the command window history file,
if the command window history file does not exist, it will create a new command window history file,
and then write data to the file before it exits.
2. CAUSE:
There are some BUGs in the following code.
3. RESOLUTION:
We can write some code to fix the BUG.
Fun5531c3 :: ; proc near
push ebp ;0x005531c3 : 55
lea ebp , dword ptr [ esp + 0FFFFFF64h ] ;0x005531c4 : 8dac2464ffffff
sub esp , 011Ch ;0x005531cb : 81ec1c010000
mov eax , dword ptr [ Data937090 ] ;0x005531d1 : a190709300
mov dword ptr [ ebp + 098h ] , eax ;0x005531d6 : 898598000000
mov eax , dword ptr [ Data93e6d0 ] ;0x005531dc : a1d0e69300
test eax , eax ;0x005531e1 : 85c0
je Label553259 ;0x005531e3 : 7474
cmp dword ptr [ Data9370b4 ] , 00h ;0x005531e5 : 833db470930000
jne Label553259 ;0x005531ec : 756b
cmp dword ptr [ Data93ba20 ] , 00h ;0x005531ee : 833d20ba930000
je Label553259 ;0x005531f5 : 7462
cmp dword ptr [ Data93926c ] , 00h ;0x005531f7 : 833d6c92930000
jne Label553259 ;0x005531fe : 7559
mov eax , dword ptr [eax] ;0x00553200 : 8b00
mov eax , dword ptr [ eax + 88 ] ;0x00553202 : 8b4058
push esi ;0x00553205 : 56
mov esi , dword ptr [eax] ;0x00553206 : 8b30
push edi ;0x00553208 : 57
pushd offset Data93ba24 ;0x00553209 : 6824ba9300
lea eax , dword ptr [ ebp - 116 ] ;0x0055320e : 8d458c
push eax ;0x00553211 : 50
call Fun434bcf ;0x00553212 : e8b819eeff
pushd offset Data9256a0 ;0x00553217 : 68a0569200
lea eax , dword ptr [ ebp - 116 ] ;0x0055321c : 8d458c
push eax ;0x0055321f : 50
lea eax , dword ptr [ ebp - 112 ] ;0x00553220 : 8d4590
push eax ;0x00553223 : 50
call Fun42c5c5 ;0x00553224 : e89c93edff
;
; -------------------------------------------------------------------------------------------
; VFP 9.0 FIX - CREATE A NEW COMMAND WINDOW HISTORY FILE BEFORE VISUAL FOXPRO EXITS
; July 2022
; -------------------------------------------------------------------------------------------
; CCB
;
; In vfp9, it will ALWAYS create a new command window history file, and then write data to the file before it exits.
; In VFP Advanced, it will open the command window history file, and then write data to the file before it exits.
;
; 2022/7/8, by ccb
;
cmp dword ptr vfpa_sys9103_data,00h
jne Label553229
mov edx , 01220h
lea ecx , dword ptr [ ebp - 112 ]
call Fun42ce21
mov edi , eax
test edi , edi
jl Label553229
jmp Label55323c
Label553229 ::
mov edx , 01228h ;0x00553229 : ba28120000
lea ecx , dword ptr [ ebp - 112 ] ;0x0055322e : 8d4d90
call Fun42ce21 ;0x00553231 : e8eb9bedff
mov edi , eax ;0x00553236 : 8bf8
test edi , edi ;0x00553238 : 85ff
jl Label553257 ;0x0055323a : 7c1b
Label55323c ::
and byte ptr [ esi + 0E5h ] , 0EFh ;0x0055323c : 80a6e5000000ef
pushd 00h ;0x00553243 : 6a00
lea eax , dword ptr [ ebp - 128 ] ;0x00553245 : 8d4580
push eax ;0x00553248 : 50
push esi ;0x00553249 : 56
push edi ;0x0055324a : 57
call Fun555683 ;0x0055324b : e833240000
;
; -------------------------------------------------------------------------------------------
; VFP 9.0 FIX - CREATE A NEW COMMAND WINDOW HISTORY FILE BEFORE VISUAL FOXPRO EXITS
; July 2022
; -------------------------------------------------------------------------------------------
; CCB
;
; In vfp9, it will ALWAYS create a new command window history file, and then write data to the file before it exits.
; In VFP Advanced, it will open the command window history file, and then write data to the file before it exits.
;
; 2022/7/8, by ccb
;
cmp dword ptr vfpa_sys9103_data,00h
jne Label553250
mov eax , edi
test eax , eax
jl Label553250
imul eax , eax , 038h
add eax , dword ptr [ Data93757c ]
mov ecx , dword ptr [eax+4]
push ebx
mov ebx , edi
push 00h
push ecx
call Fun41a6ae
pop ebx
jmp Label553250
Label553250 ::
mov ecx , edi ;0x00553250 : 8bcf
call Fun42ddf2 ;0x00553252 : e89babedff
Label553257 ::
pop edi ;0x00553257 : 5f
pop esi ;0x00553258 : 5e
Label553259 ::
mov ecx , dword ptr [ ebp + 098h ] ;0x00553259 : 8b8d98000000
call Fun42bf1d ;0x0055325f : e8b98cedff
add ebp , 09Ch ;0x00553264 : 81c59c000000
leave ;0x0055326a : c9
ret ;0x0055326b : c3
4. APPLIES TO:
VFP 7.0.0.9262
VFP 7.0.0.9465 (SP1)
VFP 8.0.0.2521
VFP 8.0.0.3117 (SP1)
VFP 9.0.0.2412
VFP 9.0.0.3504 (SP1)
VFP 9.0.0.4611 (SP2)
VFP 9.0.0.5015 (SP2)
VFP 9.0.0.5411 (SP2)
VFP 9.0.0.5721 (SP2)
VFP 9.0.0.5815 (SP2)
VFP 9.0.0.6303 (SP2)
VFP 9.0.0.6602 (SP2)
VFP 9.0.0.7423 (SP2)
The bug has been fixed in VFP Advanced.
5. REFERENCE WEBSITES:
1, baiyujia.com:
http://www.baiyujia.com
http://www.baiyujia.com/vfpdocuments/f_vfp9fix220.asp
6. OTHER:
For reference only, there is no guarantees.
Any questions or suggestions, please send me an email at ccb2000@163.com.
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