Date: Fri, 13 Oct 2006 11:58:29 +1000 From: "Murray Taylor" <MTaylor@bytecraft.com.au> To: "Raaf" <freebsd@luna.afraid.org>, <freebsd-questions@freebsd.org> Subject: RE: Question re ncurses and the various ttys Message-ID: <04E232FDCD9FBE43857F7066CAD3C0F11EF9BF@svmailmel.bytecraft.internal>
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=20
> -----Original Message-----
> From: Raaf [mailto:freebsd@luna.afraid.org]=20
> Sent: Friday, 13 October 2006 7:36 AM
> To: freebsd-questions@freebsd.org
> Cc: Murray Taylor
> Subject: Re: Question re ncurses and the various ttys
>=20
> > Hi all
> >=20
> > I've been digging around in the various man pages and=20
> havent yet found
> > the=20
> > incantations I require.
> >=20
> > Goal: to create a curses driven status screen that can run=20
> without user
> > intervention.
> >=20
> > I want to know if it is possible to _programatically_ switch to an
> > unused=20
> > virtual tty,
>=20
> Yes it is certainly possible, i have done this recently=20
> myself and like
> you i couldn't find how to do it in any man page. Fortunately=20
> i could find
> the answer in the xorg-server source code.
>=20
> You just open one of the virtual terminals and issue the VT_ACTIVATE
> ioctl:
>=20
> fd =3D open("/dev/ttyv9",O_RDONLY);
> ioctl(fd,VT_ACTIVATE,10);
>=20
> > and then use this as the display page.
> > ( By unused I mean marked 'off' in /etc/ttys )
>=20
>=20
> Well, the above code only switches the active vt...
>=20
> If you want your program output to go to a certain vt you=20
> probably have
> to open the specific vt and replace the stdin and stdout file=20
> descriptors
> of your program with the one of the one of the vt you just opened.
>=20
> But there are probably some caveats to this method, so best=20
> is to take a
> look at the getty source code and maybe add your program to /etc/ttys.
>=20
Thank you - this is probably the incantation I need along with the=20
curses newterm / setterm calls
cheers
mjt
=20
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