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#!perl -w
#
# InputTab -- encapsulate /proc/bus/input/devices
# Copyright (C) 2005 Erik van Konijnenburg
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
#
#
# Note that kernel 2.6.15 will get a /sys interface for input that
# supplies all the info also available in /proc/bus/input/devices;
# in particular, /sys/class/input/input0/device is a symlink
# to a device such as platform/i8042/serio0, that have a modalias
# that could be probed against. (tested with 2.6.14-git12)
# For now we make sure we recognise and skip lines describing this in /proc.
#
use strict;
use warnings;
use Base;
use Conf;
use Input;
package InputTab;
my $inputList = undef;
sub init () {
if (defined ($inputList)) {
return;
}
$inputList = [];
my $name = Conf::get('procFs') . '/bus/input/devices';
if (! open (IN, "<", "$name")) {
Base::fatal ("can't open $name");
}
my $work = {
capabilities => {},
};
while (defined (my $line = <IN>)) {
chomp $line;
if ($line =~ /^I: (.*)$/) {
$work->{info} = $1;
}
elsif ($line =~ /^N: Name="(.*)"$/) {
$work->{name} = $1;
}
elsif ($line =~ /^P: Phys=(.*)$/) {
$work->{phys} = $1;
}
elsif ($line =~ /^H: Handlers=(.*)$/) {
my @handlers = split (/\s+/, $1);
$work->{handlers} = {};
for my $h (@handlers) {
$work->{handlers}{$h}++;
}
}
elsif ($line =~ /^S: Sysfs=(.*)$/) {
# Do not keep track of this.
# $work->{sysfs} = $1;
}
elsif ($line =~ /^B: ([A-Z]+)=(.*)$/) {
$work->{capabilities}{$1} = $2;
}
elsif ($line =~ /^$/) {
if (! exists ($work->{info})) {
Base::fatal ("missing I: in $name");
}
if (! exists ($work->{name})) {
Base::fatal ("missing N: in $name");
}
if (! exists ($work->{phys})) {
Base::fatal ("missing P: in $name");
}
if (! exists ($work->{handlers})) {
Base::fatal ("missing H: in $name");
}
push @{$inputList}, Input->new (%{$work});
$work = {
capabilities => {},
};
}
else {
Base::fatal ("unrecognised line in $name: $line");
}
}
if (! close (IN)) {
Base::fatal ("could not read $name");
}
}
sub all () {
init;
return $inputList;
}
1;
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