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X-Authentication-Warning:	slinky.cs.nyu.edu: pechtcha owned process doing -bs
Date:	Sat, 21 Sep 2002 16:14:19 -0400 (EDT)
From:	Igor Pechtchanski <pechtcha AT cs DOT nyu DOT edu>
Reply-To:	cygwin AT cygwin DOT com
To:	Michael A Chase <mchase AT ix DOT netcom DOT com>
cc:	cygwin AT cygwin DOT com
Subject:	Re: df --local
In-Reply-To:	<Mahogany-0.64.2-284-20020921-114025.00@MCHASE-COMPAQ>
Message-ID:	<Pine.GSO.4.44.0209211612120.15469-100000@slinky.cs.nyu.edu>
Importance:	Normal
MIME-Version:	1.0

On Sat, 21 Sep 2002, Michael A Chase wrote:

> On Sat, 21 Sep 2002 12:46:13 -0400 (EDT) Igor Pechtchanski <pechtcha AT cs DOT nyu DOT edu> wrote:
>
> > On Sat, 21 Sep 2002, egor duda wrote:
> >
> > > Friday, 20 September, 2002 Rob Brown rob AT mp3 DOT com wrote:
> > >
> > > RB> OK, that will *mostly* work except for the cdrom drive issue.
> > >
> > > The proper way is to convert path to win32 form and then use
> > > GetDriveType() and GetVolumeInformation() APIs.
> >
> > This is related to the question I asked on the cygwin-developers list (
> > http://www.cygwin.com/ml/cygwin-developers/2002-09/msg00078.html ).  Maybe
> > people can discuss it here...
> >
> > Basically, Cygwin's getmntent() returns either "user" or "system" as the
> > fstype, whereas on other systems (Linux, etc) the fstype is the type of
> > the filesystem (cdrom, nfs, local, etc).  I was proposing a change to make
> > the user/system distinction part of mnt_opts, and set the type field to
> > whatever's returned by GetVolumeInformation().  This method is called in
> > path.cc anyway, to distinguish Samba filesystems...
>
> It sounds like a good idea to me.  I found the current values being used in
> a few places.
>
> newlib/libc/sys/linux/fstab.c
>    Just passing the value through.
>
> newlib/libc/sys/linux/mntent_r.c
>    Extracting the value from a string.
>    I'm not sure where the string is created, possibly path.cc.
>
> winsup/cygwin/path.cc
>    Converts bits in flags to string ("user" or "system").
>
> winsup/utils/cygcheck.cc
>    Prints whatever it finds in mnt->mnt_type.
>
> winsup/utils/mount.cc
>    Uses current values of mnt_type several places.
>
> winsup/utils/path.cc
>    Converts m->issys to string ("user" or "system").
>
> winsup/utils/umount.cc
>    Tests p->mnt_type for current values.
>
> It looks like the main confusion would come from people parsing the output
> from cygcheck or mount and expecting the current values of "user" or
> "system".

Thanks for doing this research.  These are the obvious places.  I was
afraid that I'd break something non-obvious in some package that I don't
currently have the source for...  If people agree it's a good idea, I'll
start on the implementation.
	Igor
-- 
				http://cs.nyu.edu/~pechtcha/
      |\      _,,,---,,_		pechtcha AT cs DOT nyu DOT edu
ZZZzz /,`.-'`'    -.  ;-;;,_		igor AT watson DOT ibm DOT com
     |,4-  ) )-,_. ,\ (  `'-'		Igor Pechtchanski
    '---''(_/--'  `-'\_) fL	a.k.a JaguaR-R-R-r-r-r-.-.-.  Meow!

"Water molecules expand as they grow warmer" (C) Popular Science, Oct'02, p.51


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