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Date: Wed, 18 Apr 2001 15:23:17 +0400
From: egor duda <deo AT logos-m DOT ru>
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To: "Robert Collins" <robert DOT collins AT itdomain DOT com DOT au>
CC: cygwin-developers AT cygwin DOT com
Subject: Re: handle protection - please comment
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Hi!

Wednesday, 18 April, 2001 Robert Collins robert DOT collins AT itdomain DOT com DOT au wrote:

>> If you can suggest any other way to pass handles from process A (run
>> by user User1) to process B (run by user User2) without having server
>> run by administrator, it would be great.

RC> Place them in a a list in a shared memory area. That is essentially what
RC> kernels do. No process memory access is needed.

They _are_ in shared memory area already. Passing handle value (via
shared memory area or by other means) from process A to process B is
_not_ enough to use it in process B. win32 handles _must_ be
duplicated after they were passed from one process to another.

i know only 2 things in win32 api which allow using a handle from one
process in another -- either inheritance or DuplicateHandle(). If you
know some other way, it'd be nice to see the proof-of-concept code.

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