win32utils devel - May 2008 - DeviceIoControl + IOCTL_DISK_GET_DRIVE_GEOMETRY problem

Hi all,

Ok, what am I doing wrong here?

require ''windows/device_io''
require ''windows/handle''
require ''windows/error''
include Windows::DeviceIO
include Windows::Handle
include Windows::Error

fh = File.open(''test.txt'') # Assume you have this

handle = get_osfhandle(fh.fileno)

if handle == INVALID_HANDLE_VALUE
   puts "get_osfhandle failed" 
   fh.close
   exit
end

buf   = 0.chr * 24 # sizeof(DISK_GEOMETRY)
bytes = [0].pack(''L'')

bool = DeviceIoControl(
   handle,
   IOCTL_DISK_GET_DRIVE_GEOMETRY(), # 458752
   nil,
   0,
   buf,
   buf.size,
   bytes,
   0
)

# Fails here
unless bool
   puts "DeviceIoControl failed: " + get_last_error
   fh.close
   exit
End

fh.close

Thanks,

Dan

PS - I''ve added several IOCTL macro methods to Windows::DeviceIO in CVS
(part of windows-pr).


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Hi,

2008/5/7 Berger, Daniel <Daniel.Berger at
qwest.com>:
> Hi all,
>
> Ok, what am I doing wrong here?
>
> require ''windows/device_io''
> require ''windows/handle''
> require ''windows/error''
> include Windows::DeviceIO
> include Windows::Handle
> include Windows::Error
>
> fh = File.open(''test.txt'') # Assume you have this
>
> handle = get_osfhandle(fh.fileno)
>
> if handle == INVALID_HANDLE_VALUE
>   puts "get_osfhandle failed"
>   fh.close
>   exit
> end
>
> buf   = 0.chr * 24 # sizeof(DISK_GEOMETRY)
> bytes = [0].pack(''L'')
>
> bool = DeviceIoControl(
>   handle,
>   IOCTL_DISK_GET_DRIVE_GEOMETRY(), # 458752
>   nil,
>   0,
>   buf,
>   buf.size,
>   bytes,
>   0
> )
>
> # Fails here
> unless bool
>   puts "DeviceIoControl failed: " + get_last_error
>   fh.close
>   exit
> End
>
> fh.close
>
> Thanks,
>
> Dan
>
> PS - I''ve added several IOCTL macro methods to Windows::DeviceIO
in CVS
> (part of windows-pr).
>
>
What do you want to do?
DeviceIoControl works not with file handle but with device handle.

Here is a working code:

require ''windows/file''
require ''windows/device_io''
require ''windows/handle''
require ''windows/error''
include Windows::File
include Windows::DeviceIO
include Windows::Handle
include Windows::Error

buf   = 0.chr * 24 # sizeof(DISK_GEOMETRY)
bytes = [0].pack(''L'')
handle =
CreateFile("\\\\.\\c:",0,FILE_SHARE_READ|FILE_SHARE_WRITE,0,OPEN_EXISTING,0,0)
bool = DeviceIoControl(
  handle,
  IOCTL_DISK_GET_DRIVE_GEOMETRY(), # 458752
  nil,
  0,
  buf,
  buf.size,
  bytes,
  0
)

unless bool
  puts "DeviceIoControl failed: " + get_last_error
  fh.close
  exit
end



Regards,
Park Heesob

On Tue, May 6, 2008 at 7:38 PM, Heesob Park <phasis at gmail.com>
wrote:
> Hi,
>
>  2008/5/7 Berger, Daniel <Daniel.Berger at qwest.com>:
>
>
> > Hi all,
>  >
>  > Ok, what am I doing wrong here?
>  >
>  > require ''windows/device_io''
>  > require ''windows/handle''
>  > require ''windows/error''
>  > include Windows::DeviceIO
>  > include Windows::Handle
>  > include Windows::Error
>  >
>  > fh = File.open(''test.txt'') # Assume you have this
>  >
>  > handle = get_osfhandle(fh.fileno)
>  >
>  > if handle == INVALID_HANDLE_VALUE
>  >   puts "get_osfhandle failed"
>  >   fh.close
>  >   exit
>  > end
>  >
>  > buf   = 0.chr * 24 # sizeof(DISK_GEOMETRY)
>  > bytes = [0].pack(''L'')
>  >
>  > bool = DeviceIoControl(
>  >   handle,
>  >   IOCTL_DISK_GET_DRIVE_GEOMETRY(), # 458752
>  >   nil,
>  >   0,
>  >   buf,
>  >   buf.size,
>  >   bytes,
>  >   0
>  > )
>  >
>  > # Fails here
>  > unless bool
>  >   puts "DeviceIoControl failed: " + get_last_error
>  >   fh.close
>  >   exit
>  > End
>  >
>  > fh.close
>  >
>  > Thanks,
>  >
>  > Dan
>  >
>  > PS - I''ve added several IOCTL macro methods to
Windows::DeviceIO in CVS
>  > (part of windows-pr).
>  >
>  >
>  What do you want to do?
>  DeviceIoControl works not with file handle but with device handle.
<snip>

Hm, is there any way to go from file handle to device handle?

Thanks,

Dan

2008/5/7 Daniel Berger <djberg96 at gmail.com>:
>
> On Tue, May 6, 2008 at 7:38 PM, Heesob Park <phasis at gmail.com>
wrote:
> > Hi,
> >
> >  2008/5/7 Berger, Daniel <Daniel.Berger at qwest.com>:
> >
> >
> > > Hi all,
> >  >
> >  > Ok, what am I doing wrong here?
> >  >
> >  > require ''windows/device_io''
> >  > require ''windows/handle''
> >  > require ''windows/error''
> >  > include Windows::DeviceIO
> >  > include Windows::Handle
> >  > include Windows::Error
> >  >
> >  > fh = File.open(''test.txt'') # Assume you have
this
> >  >
> >  > handle = get_osfhandle(fh.fileno)
> >  >
> >  > if handle == INVALID_HANDLE_VALUE
> >  >   puts "get_osfhandle failed"
> >  >   fh.close
> >  >   exit
> >  > end
> >  >
> >  > buf   = 0.chr * 24 # sizeof(DISK_GEOMETRY)
> >  > bytes = [0].pack(''L'')
> >  >
> >  > bool = DeviceIoControl(
> >  >   handle,
> >  >   IOCTL_DISK_GET_DRIVE_GEOMETRY(), # 458752
> >  >   nil,
> >  >   0,
> >  >   buf,
> >  >   buf.size,
> >  >   bytes,
> >  >   0
> >  > )
> >  >
> >  > # Fails here
> >  > unless bool
> >  >   puts "DeviceIoControl failed: " + get_last_error
> >  >   fh.close
> >  >   exit
> >  > End
> >  >
> >  > fh.close
> >  >
> >  > Thanks,
> >  >
> >  > Dan
> >  >
> >  > PS - I''ve added several IOCTL macro methods to
Windows::DeviceIO in CVS
> >  > (part of windows-pr).
> >  >
> >  >
> >  What do you want to do?
> >  DeviceIoControl works not with file handle but with device handle.
>
> <snip>
>
> Hm, is there any way to go from file handle to device handle?
>
It is possible but not easy.
Refer to http://msdn.microsoft.com/en-us/library/aa366789.aspx


Regards,

Park Heesob

On Wed, May 7, 2008 at 12:32 AM, Heesob Park <phasis at gmail.com>
wrote:
> 2008/5/7 Daniel Berger <djberg96 at gmail.com>:
>
>
> >
>  > On Tue, May 6, 2008 at 7:38 PM, Heesob Park <phasis at
gmail.com> wrote:
>  > > Hi,
>  > >
>  > >  2008/5/7 Berger, Daniel <Daniel.Berger at qwest.com>:
>  > >
>  > >
>  > > > Hi all,
>  > >  >
>  > >  > Ok, what am I doing wrong here?
>  > >  >
>  > >  > require ''windows/device_io''
>  > >  > require ''windows/handle''
>  > >  > require ''windows/error''
>  > >  > include Windows::DeviceIO
>  > >  > include Windows::Handle
>  > >  > include Windows::Error
>  > >  >
>  > >  > fh = File.open(''test.txt'') # Assume you
have this
>  > >  >
>  > >  > handle = get_osfhandle(fh.fileno)
>  > >  >
>  > >  > if handle == INVALID_HANDLE_VALUE
>  > >  >   puts "get_osfhandle failed"
>  > >  >   fh.close
>  > >  >   exit
>  > >  > end
>  > >  >
>  > >  > buf   = 0.chr * 24 # sizeof(DISK_GEOMETRY)
>  > >  > bytes = [0].pack(''L'')
>  > >  >
>  > >  > bool = DeviceIoControl(
>  > >  >   handle,
>  > >  >   IOCTL_DISK_GET_DRIVE_GEOMETRY(), # 458752
>  > >  >   nil,
>  > >  >   0,
>  > >  >   buf,
>  > >  >   buf.size,
>  > >  >   bytes,
>  > >  >   0
>  > >  > )
>  > >  >
>  > >  > # Fails here
>  > >  > unless bool
>  > >  >   puts "DeviceIoControl failed: " +
get_last_error
>  > >  >   fh.close
>  > >  >   exit
>  > >  > End
>  > >  >
>  > >  > fh.close
>  > >  >
>  > >  > Thanks,
>  > >  >
>  > >  > Dan
>  > >  >
>  > >  > PS - I''ve added several IOCTL macro methods to
Windows::DeviceIO in CVS
>  > >  > (part of windows-pr).
>  > >  >
>  > >  >
>  > >  What do you want to do?
>  > >  DeviceIoControl works not with file handle but with device
handle.
>  >
>  > <snip>
>  >
>  > Hm, is there any way to go from file handle to device handle?
>  >
>  It is possible but not easy.
>  Refer to http://msdn.microsoft.com/en-us/library/aa366789.aspx
Yes, I saw that. I was hoping to avoid it. I thought maybe there was
an easier way somewhere.

Thanks,

Dan