Date: Wed, 6 Jan 1999 15:22:07 -0500 (EST) From: andrewr <andrewr@slack.net> To: Kevin Street <street@iname.com> Cc: freebsd-security@FreeBSD.ORG Subject: Re: locking /dev/ttyp* Message-ID: <Pine.NEB.3.96.990106152037.24302A-100000@brooklyn.slack.net> In-Reply-To: <13971.48201.157443.285341@kstreet.interlog.com>
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I asked a question like this awhile back.. because there was an easy way
to lock ttys. I belive in linux it is vt_lock, and vt_unlock (it's been
awhile). but from everything people helped me try to do, even Soren, i was
unable to duplicate the effect. The effect was a locked terminal.. Kind
of like what xlock does for xwindows,..
Andrew
On Wed, 6 Jan 1999, Kevin Street wrote:
> I got a note from a Linux developer who is looking for a FreeBSD
> equivalent for a Linux feature. The feature allows a program to prevent
> others from opening a /dev/ttypx without having to change the permissions
> on it. This means the program does not have to be suid root.
>
> In Linux this can apparently be done with:
> int flag = 1;
> if (ioctl(fd,TIOCSPTLCK,&flag)) // prohibit opening tty from now on
> perror("cannot set secure");
>
> Is there any equivalent in FreeBSD? I know TIOCSPTLCK does not exist
> in any header I could find in 3.0.
>
> --
> Kevin Street
> street@iName.com
>
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