Driver help

Marcel Telka marcel@telka.sk
Mon Aug 18 15:06:00 GMT 2003


Hi Kiran.

On 2003.08.18 07:43, Kiran Bacche wrote:
> The ioperm package was very helpful. Thanks for that.
> U was now able to compile a sample driver into a .sys file.
> I used the SCOpenManager and CreateProcess to get it loaded.

Try use CreateService() to install the driver and StartService() to 
start it. And please see admin directory in ioperm sources.

> 
> So in effeect, when a write an application program
> б│б│hPort = CreateFile(
> б│                       "\\DosDevices\\mydevice",
> б│                       0,
> б│                       0,
> б│                       NULL,
> б│                       0,
> б│                       0,
> б│                       NULL);
> б│
> б│if (hPort == (HANDLE)-1)
> б│    {
> б│    printf("Open failed :%lx\n",hCommPort);
> б│    return -1;
> б│    }
> 
> I thought it would succeed. But CreateFile failed!
> 
> What may be the reason? A snippet of the CYGWIN code for win driver is
> as follows:
> 
>  RtlInitUnicodeString( &DeviceName, L"\\Device\\mydevice" );
>  RtlInitUnicodeString( &SymbolicLinkName, L"\\DosDevices\
> \mydevice" );
>  IoCreateDevice( DriverObject, 0, &DeviceName, ...
>  IoCreateSymbolicLink( &SymbolicLinkName, &DeviceName...


Regards.

-- 
+-------------------------------------------+
| Marcel Telka   e-mail:   marcel@telka.sk  |
|                homepage: http://telka.sk/ |
|                jabber:   marcel@jabber.sk |
+-------------------------------------------+

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