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Date: Fri, 11 Jul 2008 08:34:30 -0400 (EDT)
From: William Sutton <william AT trilug DOT org>
To: cygwin AT cygwin DOT com
Subject: Re: programming API to determine whether in 'Cygwin environment'
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All the same, you should probably check to see that whatever variables you 
choose to key off of don't alter the way your program behaves in other 
alternate Windows shells.  A co-worker of mine uses 4NT, which provides 
UNIX command and shell emulation in a native Windows format.  I expect it 
has at least $SHELL and/or $TERM.

FWIW...

William Sutton


On Fri, 11 Jul 2008, Corinna Vinschen wrote:

> On Jul 10 22:32, Yitzchak Scott-Thoennes wrote:
>> On Thu, July 10, 2008 10:06 pm, Christopher Faylor wrote:
>>> On Thu, Jul 10, 2008 at 08:49:06PM -0700, Tony Last wrote:
>>>> My console program is built for native Windows (thus does not reply on
>>>> cygwin1.dll).
>>>>
>>>> So I'm looking for a boolean method which will allow a program to tell
>>>> whether it was run from within a Cygwin shell.
>>>
>>> A PATH containing colons which weren't preceded by just a single
>>> alphabetic character would be a clue but it wouldn't be foolproof.  A HOME
>>> environment variable with no colons and forward slashes would be another
>>> clue.  I don't think there is a foolproof test, though.
>>
>> Both HOME and PATH are translated by the time the non-cygwin program
>> sees them, though??
>
> $TERM would be set.  That's very unlikely when started from cmd.
> $SHELL would be a hint, too.
>
>
> Corinna
>
> --
> Corinna Vinschen                  Please, send mails regarding Cygwin to
> Cygwin Project Co-Leader          cygwin AT cygwin DOT com
> Red Hat
>
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