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Date: Thu, 06 Feb 2003 08:27:30 -0800
To: cygwin AT cygwin DOT com
From: Randall R Schulz <rrschulz AT cris DOT com>
Subject: Re: Detecting text type in a shell script
In-Reply-To: <Pine.GSO.4.53.0302061104010.1132@arachnion.cs.Virginia.EDU
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Nicolas,

At 08:13 2003-02-06, Nicolas Christin wrote:
>On Thu, 6 Feb 2003, Max Bowsher wrote:
>
> > Nicolas Christin wrote:
> > >
> > > How can I detect what text type was chosen at install time? (So that I
> > > can appropriately set/unset my cygwin-unix-type variable.)
> >
> > man mount
>
>Max, thanks.
>
>OK... I had actually checked that, but it didn't come to me as
>straightforward how to use it for my particular problem. Can I just
>assume that if I don't see any "textmode" field in the mount table, then
>everything is fine?

That would be a conservative approach. Clearly if there are no text 
mode mounts, text mode will not be in effect.

But note that you must also check the CYGWIN environment variable, 
though, for the "binmod" / "nobinmode" option. Refer to 
<http://cygwin.com/cygwin-ug-net/using-cygwinenv.html> for details.

If you want to be more refined about the determination you make in your 
script, you'll have to analyze the mount table as reported by the 
"mount" command and emulate Cygwin's algorithm for determining which 
mount point is used to access a given file (name).


>More specifically, does something of the kind:
>
>#!/bin/sh
># test we're in binmode
>
>mount | grep textmode >/dev/null 2>&1
>
>if [ "$?" -eq "0" ]; then
>         # found text modes - probably bad
>         bail();
>else
>         proceed();
>fi;
>
>would do? (I don't have a DOS-type installed Cygwin available at the
>moment, so I'm doing this blind and can't test it...)
>
>Thanks again,
>--
>Nicolas


Randall Schulz 


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