Re: a question about lid input device

[Paul Fox <pgf@foxharp.boston.ma.us>]

henrique de moraes holschuh wrote:
 > On Sun, 13 Jun 2010, Zhang Rui wrote:
 > > Then we update the lid switch status when a Lid notification comes.
 > > right?
 > 
 > Yes.
 > 
 > > Then, IMO, userspace can get the lid status
 > > via /sys/class/input/inputX/uevent, right?
 > 
 > No, only through an IOCTL.
 > 
 > > /sys/class/input/input1/uevent:EV==21
 > 
 > That's an bitmap of al EV_EV it supports.
 > 
 > > /sys/class/input/input1/uevent:SW==1
 > 
 > That's an bitmap of al EV_SW it supports.
 > 
 > > Lid is opened but SW is set, I tried to close/open the lid and found
 > > that this bit never changes. is there something I misunderstand? can we
 > > get the lid status in userspace?
 > 
 > IOCTL(), only.
 > 
 > Since nobody got a input-utils standard package (or added something to
 > util-linux) yet to do that (AFAIK anyway), it is a MAJOR annoyance for
 > shell scripts that want to query EV_SW state...

i understand that it's not fully general, but for the case of
the lid:  is /proc/acpi/button/lid/LID/state going away?

paul
=---------------------
 paul fox, pgf@foxharp.boston.ma.us (arlington, ma, where it's 87.1 degrees)