linux-kernel - Re: O_NONBLOCK setting "leak" outside of a process??

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Message-ID: <87abzxbhau.fsf@tantale.fifi.org>
Date:	01 Feb 2007 15:15:53 -0800
From:	Philippe Troin <phil@...i.org>
To:	Denis Vlasenko <vda.linux@...glemail.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: O_NONBLOCK setting "leak" outside of a process??

Denis Vlasenko <vda.linux@...glemail.com> writes:

> What share the same file descriptor? MC and programs started from it?

All the processes started from your shell share at least fds 0, 1 and 2.

> I thought after exec() fds atre either closed (if CLOEXEC) or
> becoming independent from parent process
> (i.e. it you seek, close, etc your fd, parent would not notice that).
> 
> Am I wrong?

I'm afraid so.  Seek position and flags are still shared after an
exec.

Phil.
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