From:	richardson AT evansville DOT edu (Tony Richardson)
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: DJGPP Install Problems (DOSemu/FreeDOS beta 8)
Date:	23 May 2002 14:25:04 -0700
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Bart Oldeman <enbeo AT pg5 DOT enm DOT bris DOT ac DOT uk> wrote:
> Tony Richardson wrote:
> > eplmst AT lu DOT erisoft DOT se (Martin Stromberg) wrote:
> >> Tony Richardson (richardson AT evansville DOT edu) wrote:
> >> : following permissions
>  
> >> :   drw-rwxr-x    2 richards richards     4096 May 22 06:34 djgpp/
>  
> >> : I very much suspect that the no execute permission for user/owner on
> >> : the directory is the problem (since I can't create directories or
> >> : files under that directory from Linux either).
> >> : I am not using a DOS hard drive partition or an image file.  I don't
> >> : have a DOS partition and DOSemu seems to be dropping support for image
> >> : files in favor of redirecting the C drive to a linux directory tree. 
> >> : I suspect this is part of the problem though.
>  
> >> : Has anyone run into this problem?  Have a fix?
> >> 
> >> It looks like a problem in dosemu.  Ask on their list.
> > 
> > I'll try.  It's strange though, I can create directories under dosemu
> > with no problems and I've installed other software without a hitch too.
> 
> well, I looked at the code (mfs.c, the "Mach File System") and this is what 
> DOSEMU does:
> DOS MKDIR -> mkdir with 0755 (drwxr-xr-x & ~umask)
> so that's not the problem.
> 
> However, DOSEMU uses a certain mapping between DOS and Unix file 
> attributes/permissions:
> 
> DOS attribute  UNIX
> read-only    <->not writable (1)
> archive      <->not executable (2)
> hidden      <- filename starts with a dot and is not '..' (3)
> 
> Don't ask me why this is so, I don't know.
> The problem is probably that your DOS program did the equivalent of
> 
> attrib +a djgpp
> 
> which resets the x bit.
> 
> attrib -a djgpp
> sets the x bit again.
> 
> Maybe rule (2) should be ignored for directories.
> Then directories in DOSEMU will appear having the archive bit either 
> permanently set or permanently reset, I would need to lookup what MSDOS
> MKDIR does by default (setting or not setting the ARCHIVE bit), that 
> should be it.
> 
> Bart
> 
> Bart

Thanks Bart,  I think you've found the problem.  In dosemu I actually
have to type:

attrib +s +a directory

in order for the archive attribute to set.  I'll look through my
dosemu settings once again.

Tony

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