broadcast messages

[Jim Diamond]

On Sun, Jan  5, 2014 at 23:37 (+0100), Michael Traxler wrote:

> Hello Marc,

> thanks a lot for your fast help!

> On SuSE13.1 chown root.utmp /usr/bin/urxvt; chmod g+s /usr/bin/urxvt
> solves the problem.

> But still I'm confused:
> Why does urxvt needs the setgid utmp while xterm and the others don't need this
> to enable the registration in utmp?

>  % ls -l /usr/bin/(xterm|lxterminal|gnome-terminal|urxvt)
> -rwxr-xr-x 1 root root   81888 22. Nov 13:18 /usr/bin/gnome-terminal
> -rwxr-xr-x 1 root root   59552 28. Sep 12:34 /usr/bin/lxterminal
> -rwxr-sr-x 1 root utmp 1307664  8. Nov 17:02 /usr/bin/urxvt
> -rwxr-xr-x 1 root root  506832  2. Okt 13:53 /usr/bin/xterm

Michael,

I don't have gnome-terminal or lxterminal on my system, but xterm,
rxvt and mrxvt are all linked with libutempter, which (apparently)
uses the setgid program /usr/lib<64>/utempter to do the privileged
update of /var/run/utmp.

(As you may already know) you can check out your other terminals with
a line like
	ldd /usr/bin/gnome-terminal | grep utemp

I also have /usr/bin/xfce4-terminal which is not linked to
libutempter, but it seems to use the setgid program
/usr/libexec/gnome-pty-helper to do the update.

Cheers.

				Jim