[wdmaudiodev] Re: Need help !!!
- From: Waldemar Haszlakiewicz <waldemar.haszlakiewicz@xxxxxxxx>
- To: "Nitin Porwal (HCL Technologies Ltd)" <wdmaudiodev@xxxxxxxxxxxxx>
- Date: Sun, 11 Apr 2004 13:02:14 +0200
Here are parts of our logger -> I hope it helps
----------------------------------
//Create string.
swprintf( loggerPath, L"\\??\\C:\\glDriver_logger%d.txt", i );
RtlInitUnicodeString( &fileName, loggerPath );
InitializeObjectAttributes(
&ObjectAttributes,
&fileName,
OBJ_CASE_INSENSITIVE,
NULL,
NULL
);
Status = ZwCreateFile(
&fileHandle,
GENERIC_WRITE,
&ObjectAttributes,
&IoStatusBlock,
NULL,
FILE_ATTRIBUTE_NORMAL,
0,
FILE_CREATE,
FILE_SYNCHRONOUS_IO_NONALERT,
NULL,
0
);
if ( SUCCESS( Status ) )
{
//Close opened file and signal that we can log.
ZwClose( fileHandle );
canLog = YES;
break;
}
-------------------------------------------
//Open logging file.
RtlInitUnicodeString( &fileName, loggerPath );
InitializeObjectAttributes(
&objectAttributes,
&fileName,
OBJ_CASE_INSENSITIVE,
NULL,
NULL
);
//Direct disk access.
Status = ZwCreateFile(
&fileHandle,
FILE_WRITE_DATA | SYNCHRONIZE,
&objectAttributes,
&ioStatusBlock,
NULL,
FILE_ATTRIBUTE_NORMAL,
FILE_SHARE_READ,
FILE_OPEN,
FILE_NO_INTERMEDIATE_BUFFERING | FILE_SYNCHRONOUS_IO_NONALERT,
NULL,
0
);
//Extra check.
if ( fileHandle == NULL )
{
Status = STATUS_UNSUCCESSFUL;
}
//Append buffer to disk buffer and save.
if ( SUCCESS( Status ) )
{
//Append string to main buffer.
strcpy( pFileBuffer, buffer );
//Write main buffer to disk.
//Direct disk access.
ZwWriteFile(
fileHandle,
NULL,
NULL,
NULL,
&ioStatusBlock,
&fileBuffer,
FILE_BUFFER_SIZE,
&byteOffset,
NULL );
ZwClose(fileHandle);
--------------------------------------------
NPHTL> Hi,
NPHTL> I have written a PCI device driver. I need to create a file from driver.
NPHTL> I tried with ZwCreateFile and ZwWriteFile functions, but it didn't work.
NPHTL> Does anybody have any sample code for this? I used these function -
NPHTL> ntStatus = ZwCreateFile(&pDevExt->hLogFile,
NPHTL> FILE_APPEND_DATA|GENERIC_WRITE|SYNCHRONIZE,
NPHTL> &objectAttributes,
NPHTL> &IoStatus,
NPHTL> 0,
NPHTL> FILE_ATTRIBUTE_NORMAL,
NPHTL> FILE_SHARE_WRITE,
NPHTL> FILE_OVERWRITE_IF,
NPHTL> FILE_NON_DIRECTORY_FILE |
NPHTL> FILE_SYNCHRONOUS_IO_ALERT,
NPHTL> NULL,
NPHTL> 0
NPHTL> );
NPHTL> ZwWriteFile(pDevExt->hLogFile, NULL, NULL,
NPHTL> NULL,&IoStatus,pDevExt->achBuffer,ulLength,NULL,NULL);
NPHTL> Is anything wrong with the calls? The file is getting created properly
NPHTL> but writes are failing.
NPHTL> If anybody has any solution, then please revert back to me.
NPHTL> Thanks
NPHTL> Nitin
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