Date: 1 Dec 1999 00:43:07 +0100 From: naddy@mips.rhein-neckar.de (Christian Weisgerber) To: freebsd-questions@freebsd.org Subject: Re: Accessing sysmouse(4)? Message-ID: <821neb$1gf2$1@bigeye.rhein-neckar.de> References: <821asn$17d7$1@bigeye.rhein-neckar.de> <19991130152135.B59749@dan.emsphone.com>
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Dan Nelson <dnelson@emsphone.com> wrote:
> > Is there any real documentation or sample code to show how an
> > application at the console can access sysmouse(4)?
>
> The sysmouse manpage seems to be sufficient.
Well, at the beginning it says a process which wants to use the
mouse should open /dev/sysmouse and read from there. I tried that
(noticing that /dev/sysmouse is 600 root:wheel), and the result
didn't look too good. In particular, I got far fewer data from the
device than I should have by comparison to the actual mouse movement.
> mi.operation = MOUSE_GETINFO;
> if (ioctl(fileno(stdin), CONS_MOUSECTL, &mi) < 0)
> err(1,"CONS_MOUSECTL");
> printf("%d %d %d\n", mi.u.data.x, mi.u.data.y, mi.u.data.buttons);
Hmm, that's also the approach taken by libvgl. The description in
the man page made me think that the ioctl() interface is aimed at
servers such as moused rather than applications.
> I can't seem to find an ioctl that'll tell me font height.
I've looked through /sys/dev/syscons/ and although the font size
is used internally all over, I can't find an interface to export
it either. I guess I'll ask Kazutaka.
--
Christian "naddy" Weisgerber naddy@mips.rhein-neckar.de
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