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Date: Sun, 03 Feb 2008 23:18:16 +0100
From: Jan Kiszka <jan.kiszka@domain.hid>
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Subject: Re: [Xenomai-core] [PATCH 5/5] RTDM: check file descriptor owner.
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To: Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>
Cc: xenomai@xenomai.org

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Gilles Chanteperdrix wrote:
> This patch makes RTDM service rtdm_context_get check the owner of a fil=
e
> descriptor. This will prevent a process to close an RTDM file descripto=
r
> belonging to another process.

I assume this is a safety belt against crazy applications, right? Hope
one day we can solve this via process-local FD name spaces.

I'm OK with this if you keep the API of rtdm_context_get as is and add
an internal checked service __rtdm_context_get(user_info, fd) instead.
rtdm_context_get would then call __rtdm_context_get(NULL, fd) because it
is supposed to operate on kernel file descriptors only.

Jan


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