Re: [hatari-devel] Bug(s) in GEMDOS Dsetpath() emulation

["Roger Burrows" <anodyne@xxxxxxxxxxxx>]

On 20 Apr 2020 at 11:04, Roger Burrows wrote:

> On 20 Apr 2020 at 16:44, Eero Tamminen wrote:
> > 
> > On 4/19/20 9:57 PM, Roger Burrows wrote:
> > > There are some related bugs in Dsetpath() handling:
> > > 
> > > 1) Setting the path to '' (the empty string) should be valid, and on
> Atari
> > TOS
> > > effectively sets the path to the root of the specified drive;
> > 
> > That seems illogical, if there's no drive root
> > specified, paths should be relative to current
> > directory...
> > 
> I've just done some more testing and I think my original report was wrong.  
> There is still a bug in there somewhere (perhaps in Dgetpath()), but I need to
> refine my testing program & test some more before being quite so definite.
> 
OK, here is the definitive report :-).  There is a bug in Dsetpath() and a bug 
in Dgetpath().

(1) Under Atari TOS, attempting to set the empty path on a drive (Dsetpath("")) 
succeeds, and the current path is unchanged.  Under Hatari GEMDOS emulation, 
this fails with an error code of -34 (and unsurprisingly the current path is 
unchanged).

(2) Under Atari TOS, setting the path to the root (Dsetpath("\")) succeeds, and 
a subsequent Dgetpath() returns the empty string.  Under Hatari GEMDOS 
emulation, Dsetpath("\") succeeds, but a subsequent Dgetpath() returns "\". 
[Note: to try to avoid confusion, I'm not using C string syntax, i.e. all the 
strings shown as "\" are one byte long containing the backslash character]

Attached is the source & executable of a test program.

Roger

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   ---- File information -----------
     File:  DSETPATH.C
     Date:  20 Apr 2020, 12:50
     Size:  1715 bytes.
     Type:  Program-source

Attachment: DSETPATH.C
Description: Binary data

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   ---- File information -----------
     File:  DSETPATH.TOS
     Date:  20 Apr 2020, 12:50
     Size:  14354 bytes.
     Type:  Unknown

Attachment: DSETPATH.TOS
Description: Binary data