Free FAT12/FAT16/FAT32 filesystem (C)

larwe schrieb:
> Hi Steve,
> 
> 
>>filesystem file which I can also mount on FC3. (I used mkdosfs). Anyway
>>for some reason when the file is mounted as a loopback device, I can
>>only create names in lower case. Your test program in main.c has
>>strings in upper case. So I change your memcmp calls with strncasecmp.
> 
> 
> Not sure what this will achieve. The directory entry should contain
> uppercase characters.
> 
> There is an oddity about the vfat driver in Linux, that it tries to
> prettify directory output by silently lowercasing 8.3 names when you
> list dir contents. IIRC if a filename you create COULD be represented
> as 8.3, it is stored on disk as the 8.3 uppercase version. Even if you
> specified lowercase when you created it, there will be no LFN entry
> containing this information. This fact is however semi-invisible under
> both Windows and Linux because of the magic translation in vfat and the
> case-agnosticism of Windows.
> 
Look at the chapter 'Mount options for vfat' in the MOUNT(8) manual page.

shortname=[lower|win95|winnt|mixed]

   Defines the behaviour for  creation  and  display  of  filenames
   which fit into 8.3 characters. If a long name for a file exists,
   it will always be preferred display. There are four modes:
   ...

Anton

larwe wrote:
> Sagaert Johan wrote:
> 
>>have a look here
>>
>>http://sourceforge.net/projects/efsl
> 
> 
> Unfortunately it tries to load an advertisement from ad.doubleclick.net
> (which is blocked by my anti-advertising software) and some Javascript
> or something on the page sees that the advertisement could not load,
> tries again, tries again, ... and locks the browser up hard.
> 
> I'm not spending time on a site that's so determined to show me
> graphical spam.
> 
> There is no advertising on zws.com :)
> 
Hmm, it worked just fine for me, with no ads.
Using Firefox 1.5, with images & Javascript disabled (my usual browsing 
configuration).

Anton Hadinger wrote:
> larwe schrieb:
> > Hi Steve,
> >
> >
> >>filesystem file which I can also mount on FC3. (I used mkdosfs). Anyway
> >>for some reason when the file is mounted as a loopback device, I can
> >>only create names in lower case. Your test program in main.c has
> >>strings in upper case. So I change your memcmp calls with strncasecmp.
> >
> >
> > Not sure what this will achieve. The directory entry should contain
> > uppercase characters.
> >
> > There is an oddity about the vfat driver in Linux, that it tries to
> > prettify directory output by silently lowercasing 8.3 names when you
> > list dir contents. IIRC if a filename you create COULD be represented
> > as 8.3, it is stored on disk as the 8.3 uppercase version. Even if you
> > specified lowercase when you created it, there will be no LFN entry
> > containing this information. This fact is however semi-invisible under
> > both Windows and Linux because of the magic translation in vfat and the
> > case-agnosticism of Windows.
> >
> Look at the chapter 'Mount options for vfat' in the MOUNT(8) manual page.
>
> shortname=[lower|win95|winnt|mixed]
>
>    Defines the behaviour for  creation  and  display  of  filenames
>    which fit into 8.3 characters. If a long name for a file exists,
>    it will always be preferred display. There are four modes:
>    ...
>
> Anton

Hello,

yes - if I mount the filesystem as vfat I can tell it to show names.
ie:
"sudo mount dostest mnt_here/ -o loop -o uid=500 -t vfat -o
shortname=mixed"

The problem I was trying to avoid was using long file names since dosfs
does not support them. So before I did the mount with -t msdos. It does
not accept the shortname options. With vfat it seems the files are
created with uppercase names, even if I enter lowercase ones. Bizarre.
In any case changing the memcmp to strncasecmp as I recommended to
Larwe is optional, but I believe useful to extend fsdos portability.

I really don't understand the difference between the linux file types
of msdos, umsdos, and vfat.

Thanks for the suggestion, ~Steve

stevecalfee@hotmail.com wrote:

> I really don't understand the difference between the linux file types
> of msdos, umsdos, and vfat.

I believe that MSDOS does not support long file names, while VFAT does.

UMSDOS is a filesystem that emulates unix file system functionality on
top of a DOS (FAT) filesystem, such as permissions, ownership, etc.

It was used in the old days for running linux on a DOS partition without
having to repartition your drive. It is crucially important that if you
use umsdos, you do not touch the files when inside DOS/windows :)

ttyl,

--buddy