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Re: echo and CYGWIN variable
- From: Igor Pechtchanski <pechtcha at cs dot nyu dot edu>
- To: Ronald Landheer-Cieslak <ronald at landheer dot com>
- Cc: cygwin at cygwin dot com
- Date: Fri, 23 May 2003 08:56:32 -0400 (EDT)
- Subject: Re: echo and CYGWIN variable
- Reply-to: cygwin at cygwin dot com
On Fri, 23 May 2003, Ronald Landheer-Cieslak wrote:
> On Thu, 22 May 2003, Igor Pechtchanski wrote:
> > On Thu, 22 May 2003, Ronald Landheer-Cieslak wrote:
> > > On Wed, 21 May 2003, Igor Pechtchanski wrote:
> > > > Whenever you redirect to a file, the mount table is consulted, and the
> > > > appropriate mode is selected (i.e., CYGWIN has no effect). If you use
> > > > Win32 paths, there are no entries in the mount table, so I'm not quite
> > > > sure what's going on.
> > > Correct me if I'm wrong (please), but I thought this worked like this:
> > > 1) d:/foo -> /cygdrive/d/foo
> > > 2) look in mount table
> > > the mount type (bin or text) is whatever the parent of /cygdrive/d/foo is,
> > > which is /cygdrive/d -> /cygdrive -> /
> > > if / is binmode, (and there's nothing between /cygdrive/d/foo and / in the
> > > mount table), /cygdrive/d/foo is binmode.
> > >
> > > But please, enlighten me if this is not how it works :)
> > >
> > > > You could try using backslashes instead of forward slashes (I think
> > > > those force textmode),
> > > If so, where does this:
> > > d:\\foo -> d:/foo -> /cygdrive/d/foo
> > > break?
> > >
> > > rlc
> > That's not quite how it works, Ronald. You were right in tracing back to
> > /cygdrive, but you should have realized that /cygdrive is a mount in
> > itself, and it will not get further reduced to "/".
> Of course, silly of me..
> > So, if you use the /cygdrive/d syntax, it will use the mode on the
> > /cygdrive mount. If you use the d:\\ syntax, the files will be opened
> > using raw Win32 calls, and who knows what the mode will be (ISTR that it
> > defaults to text).
> And if you use the d:/ syntax, will that translate to the cygdrive syntax
> or to the d:\\ syntax?
> >From what I understand of your previous mail, if d:\\ forces textmode, but
> d:/ does not, d:/ is translated to /cygdrive/d whereas d:\\ is not.. Is
> this documented somewhere? (If not, I'll be happy to do the writing).
I believe (and I hope someone will correct me if I'm wrong) that either a
'\' or a ':' in a normal filename forces textmode and bypasses the mount
table (IOW, d:/ and d:\\ are equivalent). ISTR some discussions on
this... Of course, the code is always your best reference (don't have
time to look myself just now).
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