Date: Wed, 6 Jan 1999 17:23:49 GMT From: andrewr <andrewr@slack.net> To: jrz@wnm.net Cc: freebsd-security@FreeBSD.ORG Subject: Fwd: Re: locking /dev/ttyp* Message-ID: <36939c25.488b.0@wnm.net>
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****** Forwarded Message Follows *******
>To: Kevin Street <street@iname.com>
>From: andrewr <andrewr@slack.net>
>Date: Wed, 6 Jan 1999 15:22:07 -0500 (EST)
>
>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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