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Index > Windows > append data to a text file

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mns



Joined: 20 Dec 2007
Posts: 121
Location: Piliyandala,Sri lanka
mns
please can someone tell me how to append data to a text file.not overwriting the content
for that
i'v tried to open file like following,
invoke CreateFile,FileName, FILE_APPEND_DATA,FILE_SHARE_READ,NULL,\
OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0

but fasm has given following error Crying or Very sad

undefine symbol
pushd FILE_APPEND_DATA



>I,m attaching the whole .asm file


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Filename: exp12.ASM
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Last edited by mns on 01 Aug 2011, 09:07; edited 1 time in total
Post 31 Jul 2011, 10:45
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revolution
When all else fails, read the source


Joined: 24 Aug 2004
Posts: 17662
Location: In your JS exploiting you and your system
revolution
Use CreateFile with OPEN_ALWAYS
Then SetFilePointer,[handle],0,0,FILE_END
Then WriteFile,[handle],...
Post 31 Jul 2011, 10:51
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AsmGuru62



Joined: 28 Jan 2004
Posts: 1419
Location: Toronto, Canada
AsmGuru62
In addition: FILE_SHARE_READ alone will not allow to append, because appending is actually writing!
Smile
Post 31 Jul 2011, 12:00
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mns



Joined: 20 Dec 2007
Posts: 121
Location: Piliyandala,Sri lanka
mns
hey Thank you very much guys for quick and clear responses.I'v got the point.
can any one of you direct me to a good windows assembly(proberbly with FASM)tutorial?
Thanx again.
Post 31 Jul 2011, 15:17
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revolution
When all else fails, read the source


Joined: 24 Aug 2004
Posts: 17662
Location: In your JS exploiting you and your system
revolution
AsmGuru62 wrote:
In addition: FILE_SHARE_READ alone will not allow to append, because appending is actually writing!
Only GENERIC_READ and GENERIC_WRITE affect the applications ability to write. Sharing options affect only other handles access to the file.
Post 31 Jul 2011, 15:26
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Enko



Joined: 03 Apr 2007
Posts: 678
Location: Mar del Plata
Enko
for windows, the best asm tutorials are the iczelion's, but they are in masm.

http://win32assembly.online.fr/tutorials.html

there is somewhere in the web, the fasm translation, but I don't thing you will have much problems translating masm to fasm, the important thing are the api calls.
Post 31 Jul 2011, 16:44
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mns



Joined: 20 Dec 2007
Posts: 121
Location: Piliyandala,Sri lanka
mns
thanx,
sorry to ask another one,
Is there a way of search a sring in a text file using windows API? Question
Post 01 Aug 2011, 02:53
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Picnic



Joined: 05 May 2007
Posts: 1288
Location: Paradise Falls
Picnic
mns wrote:
please can someone tell me how to append data to a text file.not overwriting the content

Hi,

Check also here
Post 02 Aug 2011, 13:44
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mns



Joined: 20 Dec 2007
Posts: 121
Location: Piliyandala,Sri lanka
mns
Thanx!!
Post 02 Aug 2011, 17:22
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