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Date: Wed, 11 May 2016 10:42:58 +0300
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From: "Eli Zaretskii (eliz AT gnu DOT org) [via djgpp AT delorie DOT com]" <djgpp AT delorie DOT com>
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Subject: Re: Fwd: A few DJGPP libc.a bugs
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> From: "Wiktor S. (wswiktorSP AT Mpoczta DOT fm) [via djgpp AT delorie DOT com]" <djgpp AT delorie DOT com>
> Date: Tue, 10 May 2016 21:36:37 +0200
> 
> > Well that exFAT support suffers under WIn10 Home 32 bit from the same
> > bug as NTFS, which makes it not very useful for DJGPP.
> > 
> > DJGPP seems to be unable to open files on drives different from C:
> > and formatted as NTFS or exFAT when LFN is required.
> 
> 
> I have bad news. This also happens in XP on exFAT partitions.
> (one of course needs an update for XP to access exFAT)
> 
> ========
> C:\>type g:\longfilename.txt
> it works
> 
> C:\>cat g:\longfilename.txt
> c:/dj/bin/cat.exe: g:\longfilename.txt: Permission denied (EACCES)

Can you debug the libc functions involved and see which one of them
fails?