C / C++ / MFC

12-Jul-09 23:38

Hi , i have developed a program to read registry from local machine,now when i run the exe in a machine which is logged in as admin then my exe gives correct value but when i run in a machine that do not logged in as a user which is not part of admin group then i cannot access to registry why it so.

If i use wmi to read registry then will the above problem get solved ???

CPallini13-Jul-09 0:10

CPallini

13-Jul-09 0:10

This is a Vista related issue, I suppose. A program having 'standard' user privileges can only access the HKEY_CURRENT_USER tree, as far as I know.
Smile | :)

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Mogamboo_Khush_Hua13-Jul-09 1:00

13-Jul-09 1:00

No i am running in windows xp network and i am reading this key

HKEY_CURRENT_USER\\Software\\Policies\\Microsoft\\Windows\\Control Panel\\Desktop\\ScreenSaveTimeOut

This key is set through group policy by the system admin for a particular domain but i am unable to read this key in non admin rights , but in admin rights i can read this key.

Why it is soooooooooo ??

Below is my code

void GetScreenSaverTimeOutInfo()
	{
		try
		{
			HKEY hKey;
			strCategory=SysAllocString(L"ScreenSaverInfo");
			strItemName=SysAllocString(L"ScreenSaveTimeOut");
			strInstallDate=SysAllocString(L"-NA-");
			strVersion=SysAllocString(L"-NA-");
			strValue1=SysAllocString(L"-NA-");
			strValue2=SysAllocString(L"-NA-");
			strValue3=SysAllocString(L"-NA-");

			if (RegOpenKeyEx(HKEY_CURRENT_USER, TEXT("Software\\Policies\\Microsoft\\Windows\\Control Panel\\Desktop"), 0, KEY_ALL_ACCESS, &hKey)!=ERROR_SUCCESS)
			{
				WriteToFile(GetNewRow());
			}
			else
			{
				DWORD dwType = REG_SZ;
				TCHAR buf[10] ;
				DWORD dwBufSize = 10;
				
				if( RegQueryValueEx(hKey,TEXT("ScreenSaveTimeOut"),0, &dwType, (LPBYTE)&buf, &dwBufSize) == ERROR_SUCCESS)
				{
					strValue1=SysAllocString(buf);
					WriteToFile(GetNewRow());

					SysFreeString(strValue1);
					SysFreeString(buf);
				}
				else
				{
					WriteToFile(GetNewRow());
				}
				RegCloseKey(hKey);
			}


			SysFreeString(strCategory);
			SysFreeString(strItemName);
			SysFreeString(strInstallDate);
			SysFreeString(strVersion);
			SysFreeString(strValue1);
			SysFreeString(strValue2);
			SysFreeString(strValue3);
		}
		catch(char *error)
		{
			//Release();
			error="Error occurred in function GetScreenSaverSecureInfo()";
			throw error;
		}
	}

Stuart Dootson13-Jul-09 1:05

Stuart Dootson

13-Jul-09 1:05

It's because that key is protected from user access - registry keys can have permissions and ACLs just like files can. You can see and manipulate those using regedit.

The group policy stuff does a lot of this sort of thing - you'll find even if you change the values under the key, they'll get reset again when you next login.

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

Mogamboo_Khush_Hua13-Jul-09 1:18

13-Jul-09 1:18

is there any way i can read this key ??????????

Sigh | :sigh:

Roger Stoltz13-Jul-09 1:31

Roger Stoltz

13-Jul-09 1:31

Member 6392036 wrote:
is there any way i can read this key ???

Of course, open it with KEY_QUERY_VALUE or KEY_READ access rights instead of KEY_ALL_ACCESS.

"It's supposed to be hard, otherwise anybody could do it!" - selfquote
"High speed never compensates for wrong direction!" - unknown

Rajesh R Subramanian13-Jul-09 2:03

Rajesh R Subramanian

13-Jul-09 2:03

It's amazing to see how people cannot take care of little things like that. They just throw anything at it and expect it to work. Not to mention they'll blame UAC then. Smile | :)

It is a crappy thing, but it's life -^ Carlo Pallini

Roger Stoltz13-Jul-09 2:11

Roger Stoltz

13-Jul-09 2:11

Rajesh R Subramanian wrote:
Not to mention they'll blame UAC then.

I've been blaming UAC[^] for basically everything the latest 15 or so years.
I can assure you that my first encounter wasn't really friendly. Wink | ;)

"It's supposed to be hard, otherwise anybody could do it!" - selfquote
"High speed never compensates for wrong direction!" - unknown

Rajesh R Subramanian13-Jul-09 2:14

Rajesh R Subramanian

13-Jul-09 2:14

It is a crappy thing, but it's life -^ Carlo Pallini

Mogamboo_Khush_Hua13-Jul-09 2:59

13-Jul-09 2:59

Rajesh R Subramanian wrote:
It's amazing to see how people cannot take care of little things like that

which little things you are talking please elaborate it.

Rajesh R Subramanian13-Jul-09 3:06

Rajesh R Subramanian

13-Jul-09 3:06

Little things like using KEY_QUERY_VALUE instead of KEY_ALL_ACCESS when applicable.

It is a crappy thing, but it's life -^ Carlo Pallini

How to get file record from file name?

Muhammad Mazhar13-Jul-09 0:27

Muhammad Mazhar

13-Jul-09 0:27

I think registry write access will be only available to privileged users. If you want your application to read/write settings under any account then perhaps you should make use of app configuration file to keep track of settings.

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denghp12-Jul-09 23:19

12-Jul-09 23:19

Hello everyone:
Disk format is NTFS.How can I get file record like using DeviceIoControl function with the control code FSCTL_GET_NTFS_FILE_RECORD to retrieve the file record?
Any information is appreciated,thanks in advance.

Adam Roderick J12-Jul-09 23:29

Adam Roderick J

12-Jul-09 23:29

can u please clear your question. Confused | :confused:

denghp14-Jul-09 2:43

14-Jul-09 2:43

See my reply to chandu004.

chandu00412-Jul-09 23:33

12-Jul-09 23:33

do you mean to say,
you need to pass FSCTL_GET_NTFS_FILE_RECORD to DeviceIoControl to get a record in file?
if so, i remember, there are some in and out parameters in DeviceIOControl,
so you can retrieve the record from a file in your despatch handler code and then pass the structure out to the user layer.
but still, some clarity is required on your post.

--------------------------------------------
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thanks.
chandu.

denghp14-Jul-09 2:42

14-Jul-09 2:42

sorry,I mean that how to get file record from file name easily.I haven't have a good idea so far.

chandu00414-Jul-09 17:50

14-Jul-09 17:50

please explain your problem in detail.
it is very vague.

--------------------------------------------
Suggestion to the members:
Please prefix your main thread subject with [SOLVED] if it is solved.
thanks.
chandu.

denghp21-Jul-09 21:01

Re: How to get file record from file name? [modified]

21-Jul-09 21:01

I mean if I only know the file name,how can I get the file record?The record structure is below:

typedef struct { LARGE_INTEGER FileReferenceNumber; DWORD FileRecordLength; BYTE FileRecordBuffer[1];
} NTFS_FILE_RECORD_OUTPUT_BUFFER, *PNTFS_FILE_RECORD_OUTPUT_BUFFER;

This structure can be obtained by DeviceIoControl function.Now I only have the file name,so I can't use this function.I need another method to get this struct information.

chandu00422-Jul-09 1:08

22-Jul-09 1:08

do you still want to use device io control for this or do you want any other way?
for example, you can use the following code to retrieve a structure from a file.

NTFS_FILE_RECORD_OUTPUT_BUFFER s;
FILE *fp;
fp=fopen(yourfilename,"rb");
fread(&s,sizeof(NTFS_FILE_RECORD_OUTPUT_BUFFER),1,fp);
fclose(fp);

or if you want to achieve this only using deviceiocontrol, then,
pass the filename to the deviceiocontrol as input parameter,
openthe file inside, read the structure and pass it as out parameter to the device io control.

--------------------------------------------
Suggestion to the members:
Please prefix your main thread subject with [SOLVED] if it is solved.
thanks.
chandu.

modified on Wednesday, July 22, 2009 7:24 AM

denghp22-Jul-09 14:52

22-Jul-09 14:52

Thank you for your reply!I use this record information to get the layout of the file on the NTFS disk.This is called data run in the NTFS document,which is can be retrived from http://www.linux-ntfs.org/doku.php[^]
By the way, why the beginning of the file is the NTFS_FILE_RECORD_OUTPUT_BUFFER record?Could you give me some information?

chandu00422-Jul-09 19:33

22-Jul-09 19:33

i think you are entirely deviating the topic from what you exactly wanted.
please explain your problem very clearly and i shall definitely help you solve your problem.
explain your requirement and problem in steps.

--------------------------------------------
Suggestion to the members:
Please prefix your main thread subject with [SOLVED] if it is solved.
thanks.
chandu.

denghp22-Jul-09 19:53

22-Jul-09 19:53

I'm sorry for make you confused.My problem is if I know a file name(contains path),how can I get the layout of the file on a NTFS disk?
For instance,if the file name is e:\data.bin,this file was split to three parts on the disk.Now how can I get each part's starting logical cluster number,data length on the disk.The meaning of starting logical cluster number and data length is explained in the NTFS document I mentioned above.
Do I explain my question clearly?