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Date: Fri, 17 Mar 2023 10:51:05 -0400
From: Ed Maste <>
Subject: Re: TTY pushback vulnerabilities / TIOCSTI

On Wed, 15 Mar 2023 at 04:45, Fabian Keil <> wrote:
> In ElectroBSD I removed TIOCSTI support in 2017 [0] and haven't
> noticed any problems.
> According to the commit message "TIOCSTI is still used in tcsh,
> but as tcsh isn't compiled on ElectroBSD we don't care".

All of tcsh's uses of TIOCSTI are in `#ifdef TIOCSTI` blocks so tcsh
should still build and function with it removed (e.g., with the ioctl
renamed) I imagine.

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