Problem to save file on the hard disk! What I have to set to do it ?

[Thomas Doerfler (nt)]

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Matteo,

I assume you are working on a standard i386 pc hardware. Have a look at
the "fileio" sample application available in the RTEMS source tree under
"cpukit/testsuites/samples/fileio". You should try to get it working on
your system (it should work from scratch if you got a standard PC system).

Have a look at "fileio.doc", it explains a bit what should work with
this sample program.

In your application, you will have to do the following steps to get
access to your harddisk:

- - add the IDE and ATA drivers to your standard driver table (see entries
in fileio/system.h)
- - add a rtems_bdbuf_configuration data structure to your system (once
again, see fileio/system.h)

- - add a fs_table to your application, which specifies which harddisk
partitions are to be mounted to which mount points (see fileio/

- - call the "rtems_ide_part_table_initialize" function after system
startup to read in your harddisk partition table. This call will create
a new device node (/dev/hda1 ...) for each partition available.

- - call the "rtems_fsmount" function to mount the partitions to their
respective mount points. Have a look into "libmisc/fsmount" to find out,
how it works.

Then you can access the harddisk partitions at their respective mount
points.

wkr,
Thomas.


Matteo schrieb:
> Hi 
> Joe says to me ask you how I can save a file on hard disk? if I have to set 
> something in my linux's grub?
> 
> below the previous email sent to Joel.
> 
> Thanks in advance 
> 
> Matteo
> 
> Scrive Joel Sherrill <joel.sherrill at oarcorp.com>:
> 
> 
>>Matteo wrote:
>>
>>
>>>Hi
>>>
>>>I'm trying to use the fdopen example of the package example-4.6.99.2 but it
>>
>>>doesn't works, It doesn't create the file!
>>> 
>>>
>>
>>I could be wrong but I think this one actually was submitted as part of 
>>a bug report and
>>the bug may still be outstanding.  It may be fixed.  I just don't 
>>remember.  See below for
>>the more likely case.
>>
>>
>>>But I can launch the hello world example and I create some simple posix
>>
>>program 
>>
>>>with rtems yet so I think to have configured it well.
>>>So what can be the problem ?
>>>May be when I launch the fdopen example I have to set some particular
>>
>>privilege 
>>
>>>in the "grub"(my linux boot loader) to allow it to write on the hard disk?
>>
>>this 
>>
>>>is only my newbye's opinion..
>>>
>>> 
>>>
>>
>>Ohh.... if you are doing anything with the hard disk, then there is some 
>>filesystem specific
>>configuration to get things right.  The example code is only going to 
>>work with the IMFS
>>which is a RAM based filesystem.
>>
>>Ask on the list so someone list Thomas can point you to an example setup. 
>>
>>
>>>Thanks in advantage
>>>
>>>Matteo
>>>
>>> 
>>>
>>
>>
>>
> 
> 
> 


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IMD Ingenieurbuero fuer Microcomputertechnik
Thomas Doerfler           Herbststrasse 8
D-82178 Puchheim          Germany
email:    Thomas.Doerfler at imd-systems.de
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