Re: write file fails with error number 5 = Access is denied
Thanks you Tom for your quick response,
yes i am opening the correct path,
I have debug my code and check that the result of your code and my code are
the same, and they both will open the d:\ drive (for example) of the USB, I
am reading the MBR and the FAT of the USB, i also compare the data i copy
with WINHEX to check that i am copy the right Path.
so the read is OK and the PATH of the write is OK, I believe the problem is
with "restrictions, imposed by Windows XP and Windows Vista operating
systems. Windows XP prevents your from using raw access to disks if the
application is run under restricted
(non-administrative) account. Windows Vista doesn't allow you to access the
disks from user-mode processes at all."
from : http://www.eldos.com/rawdisk/
I wonder if this is the problem i am facing ,and if yes how this problem can
be solved by code ?
zack.
"Tom Serface" <tom.nospam@camaswood.com> wrote in message
news:D14BBD5F-2629-4627-B2FF-3558ED77E778@microsoft.com...
Probably a simple question, but are you sure you are opening the correct
device and that you have permission to access it? I'm not sure where
"Drive_Letter" gets assigned in your code so if it were null or an invalid
device that would cause the problem. Try this syntax:
CString cs;
cs.Format(_T("\\\\.\\%c:"),cDrive);
HANDLE hDrive =
CreateFile(cs,GENERIC_READ|GENERIC_WRITE,FILE_SHARE_READ|FILE_SHARE_WRITE,
0,OPEN_EXISTING,FILE_ATTRIBUTE_NORMAL,0);
if(hDrive == INVALID_HANDLE_VALUE) {
hDrive = CreateFile(cs,GENERIC_READ,FILE_SHARE_READ|FILE_SHARE_WRITE,0,
OPEN_EXISTING,FILE_ATTRIBUTE_NORMAL,0);
}
Tom
"zack" <zack@discussions.microsoft.com> wrote in message
news:443326A4-C149-4156-BCB1-FC5B85E14A54@microsoft.com...
Hi
I trying to copy to the usb , raw data with function writefile(..),
and i get the error number 5 =Access is denied,
I am working with vista SP1, and i guess it got to be connected to my
priviliges.
Do you know how to avoid this ERROR ?
any code sample maybe ?
-i have successed to read from the usb all the raw data in the same way.
here is the code i am using:
char _devicename[] = "\\\\.\\A:";
_devicename[4] = Drive_letter;
hDevice = CreateFileA( _devicename,
GENERIC_READ,
FILE_SHARE_READ | FILE_SHARE_WRITE,
NULL,
OPEN_EXISTING,
0,
NULL);
if (hDevice == INVALID_HANDLE_VALUE)
return ;
SetFilePointer (hDevice, (i*SectorNumber_for_each_read*512),
NULL,FILE_BEGIN);
if (!WriteFile (hDevice, sectorBuffer, 512*SectorNumber_for_each_read,
&numberOfBytesWrite, NULL) )
{
win = GetLastError();
break;
}
CloseHandle(hDevice);