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Date: Wed, 24 Oct 2001 11:43:53 +0400
From: egor duda <deo AT logos-m DOT ru>
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Reply-To: egor duda <cygwin-developers AT cygwin DOT com>
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Message-ID: <195555408.20011024114353@logos-m.ru>
To: Christopher Faylor <cygwin-developers AT cygwin DOT com>
Subject: Re: Need name and functionality suggestions for a new utility
In-Reply-To: <20011024012942.B14370@redhat.com>
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 <3BD64F1E DOT 6010102 AT ece DOT gatech DOT edu> <20011024012942 DOT B14370 AT redhat DOT com>
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Hi!

Wednesday, 24 October, 2001 Christopher Faylor cgf AT redhat DOT com wrote:

CF> On Wed, Oct 24, 2001 at 01:18:22AM -0400, Charles Wilson wrote:
>>Christopher Faylor wrote:
>>>Does anyone have an idea for a name?  Or even an idea for more
>>>functionality for this utility?  Now that I think of it, this utility
>>>should also change the shared memory id 
>>
>>Can you DO that without adding hooks to cygwin1.dll?

CF> No.  You need to add some hooks.  The cygheap changes that I made a while
CF> ago make this very easy, though.

does your tweak works in such scenario?

 "cygwin-app-1" starts "non-cygwin-app-2" and it starts "cygwin-app-3"

will cygwin-app-3 be properly "jailed"?

i was supposing to write a patch to add (ahem) yet another CYGWIN env
variable option so one can write, e.g.
'set CYGWIN=profile:old_install'

CF> I had the hooks written and cygwin compiled.  Then, sending this email
CF> started a whole flood of new ideas about what needed to be changed.

CF> I think it might just be possible to allow two different cygwins to
CF> coexist without this as long as they share the mount table.  I don't
CF> know if that's a good thing or not.

CF> It means that instead of getting "shared memory mismatch" we'll be hearing
CF> about how the new version of cygwin doesn't fix their problems -- because
CF> they still have a cygwin1.dll in their windows/system directory.

this can be easily revealed by cygcheck.

CF> Hmm.  Maybe I should make cygwin1.dll complain if it is placed in the
CF> windows/system directory.

and this too.

Egor.            mailto:deo AT logos-m DOT ru ICQ 5165414 FidoNet 2:5020/496.19