Re: [gentoo-portage-dev] PATCH: Disable logging during pkg_config (#99527)

[Jason Stubbs]

On Thursday 21 July 2005 01:32, Drake Wyrm wrote:
> Jason Stubbs <jstubbs@g.o> wrote:
> > On Wednesday 20 July 2005 15:38, Drake Wyrm wrote:
> > > Jason Stubbs <jstubbs@g.o> wrote:
> > > > When logging is enabled, ebuild output is passed via tee. Running
> > > > anything that checks for terminal type inside of pkg_config
> > > > therefore doesn't work correctly. This patch disables logging
> > > > during pkg_config altogether.
> > >
> > > A cleaner way of accomplishing that is to write the ebuild such that
> > > portions which need a terminal either attach to a terminal (`make
> > > menuconfig </dev/tty >/dev/tty`)
> >
> > Forgive my ignorance, but how does this work when it comes to
> > multiuser?
>
> You mean when there's multiple terminals in use? The device "/dev/tty"
> has more magic. No matter what terminal you're using, even if stdin,
> stdout, and stderr have been closed or redirected, "/dev/tty" is
> _always_ your current terminal.
>
> 	{ echo foo >/dev/tty ; } </dev/null &>/dev/null
>
> Still gets through! Or even more detached:
>
> 	( ( sleep 2 ; echo foo >/dev/tty ) & disown ) </dev/null &>/dev/null
>
> The only way this can fail is if the terminal actually closes.
>
> 	( ( sleep 2 ; echo foo >/dev/tty || touch /tmp/wombat ) & \
> 	disown ) </dev/null &>/dev/null ; exit
>
> Other apps use this, also. You may have noticed that when you drop to
> shell from `less` and type `tty`, you're no longer attached to
> /dev/pts/* or /dev/vc/*, but simply to /dev/tty. Do the same thing in
> multiple xterms, and you'll find yourself with several terminals all
> attached to unique instances of /dev/tty which have nothing to do with
> each other. More magic.

That works for me then. :)

--
Jason Stubbs