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From: Bernard Dautrevaux <Dautrevaux AT microprocess DOT com>
To: "'cygwin AT sourceware DOT cygnus DOT com'" <cygwin AT sourceware DOT cygnus DOT com>
Subject: RE: New version of setup.exe with fixes for i686-pc-cygwin/* prob
	lem
Date: Fri, 9 Jun 2000 18:07:25 +0200 
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> -----Original Message-----
> From: Chris Faylor [mailto:cgf AT cygnus DOT com]
> Sent: Thursday, June 08, 2000 10:11 PM
> To: cygwin AT sourceware DOT cygnus DOT com
> Subject: Re: New version of setup.exe with fixes for i686-pc-cygwin/*
> problem
> 
> 
> On Thu, Jun 08, 2000 at 09:03:22PM +0100, Jonathan Larmour wrote:
> >In article <20000608173106 DOT 5178 DOT qmail AT web125 DOT yahoomail DOT com> 
> you write:
> >>
> >>You need to decide, binmode or textmode.  Operating in both 
> is a major cause
> >>for a major headache.
> >
> >Isn't the point that it depends on the data at that mount 
> point? In the case
> >of Windows-y areas, text mode is exactly correct.
> >
> >Plus textmode is still the default for mount.
> 
> Yup.  Good points.
> 
> If you know what you're doing, there is no reason not to mix. 
>  I think that
> the default "root" mounts like /bin, /lib, and /usr should be 
> binary.  Everything
> else can be whatever makes sense.
> 
> The problem is that many people use an "identity mount" where 
> c:\ == /.  The
> current version of setup.exe mounts root as binary, similarly 
> to the Cygwin CD.
> 
> This causes problems who have something like a 'c:\src' 
> directory since it will
> automatically be considered to be binmode by default.
> 
> DJ has suggested that a future version of cygwin should 
> default to "read text,
> write binary".  I think we'll probably be moving to that 
> model sometime soon.

Here is how I've managed to avoid problems in my UNIX->Windows ports: I
wrapped all open's in a routine that (among other things) change all "read
only" opens to text if not specified, and all "read/write" or "write only"
opens to binary (still if not explicitely specified). 

Thus providing an implicit default like this (perhaps for a drive mounted
"-a") should be quite good. Note that "read/write" in text mode is quite
difficult to implement and use correctly, especially if one seeks before
writing... :-), so the best default in this case is "binary".

Chris, do I understand correctly that above, when saying "read text, write
binary" you are speaking about the default mode for open's where neither
O_TEXT nor O_BINARY are specified? otherwise reading a file in text mode
then switching to binary when writing the same file will most probably give
quite weird results ;-(

Anyway thanks for the good job, 1.1.2 seems what I was waiting for.

	Bernard

> 
> This will essentially provide a third mount option, like "-a".
> 
> cgf
> 
> --
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> 

--------------------------------------------
Bernard Dautrevaux
Microprocess Ingéniérie
97 bis, rue de Colombes
92400 COURBEVOIE
FRANCE
Tel:	+33 (0) 1 47 68 80 80
Fax:	+33 (0) 1 47 88 97 85
e-mail:	dautrevaux AT microprocess DOT com
		b DOT dautrevaux AT usa DOT net
-------------------------------------------- 

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