hi!, first of all sorry for my English and thanks to Google Translate 
I tried this patch, but did not let me enter the unlock code and I had to restart the Pc
I solved it editing original script (without patch) and I added the option -mouse
After this, run the script locks the keyboard and mouse but no screen. It work ok.
hopefully this will help many people, it is my first posting here 
below is the script I was like to my (in bold the new lines),
DO NOT COPY, for some reason the wysywyg editor of the forum break it and does not work, then download the next link:LOCK-KEYBOARD-FOR-BABY.PY.tar.gz (I put the file on my google Site)
Code:
#!/bin/env perl
use warnings;
use strict;
use Data::Dumper;
my $lastmod="2009/05/07";
my $datemod="2006/05/25";
my $defaultpassword="QuitNow";
my $progname=$0;
$progname =~ s%.*/%%g;
sub usage($)
{
my ($exitcode)=@_;
print STDERR <<END_OF_USAGE ;
usage for $progname
$progname [-xy=XX,YY]
[-p|password thepassword]
[-stars|-visible|-visible=maxlen]
[-message]
[-help]
[-mouse]
$progname was written by:Chris Sincock
(this version $datemod)
Copyright (C) 2006 Chris Sincock
(this version $lastmod)
Copyright (C) 2009 Diego Guerrero
This is free software; see the GNU GPL license for copying conditions.
There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR
A PARTICULAR PURPOSE
If you specify -password or -stars it will default to not telling you
what password to type
If you don't specify -password or -stars or -vis, it will tell you
what password to type and the password will be $defaultpassword
You can clear whatever has already been typed by hitting <Return>
END_OF_USAGE
exit($exitcode);
}
my $password=$defaultpassword;
my $message="Type the password to quit\n:";
my $true=1;
my $false=0;
my $noshow=$true;
my $maxshownlength=30;
my $defaults_changed=$false;
my $defaults_changed_vis=$false;
my $mouse=$false;
my $keyb=$false;
my @startpos=(0,0);
while (@ARGV)
{
my $arg=shift @ARGV;
if($arg =~ /^-xy=(\d+),(\d+)$/i)
{
@startpos=($1,$2);
}
elsif($arg =~ /^(-|--)(h|help|usage|[?])$/i)
{
usage(0);
}
elsif($arg =~ /^(-|--)(p|pass|password)$/i)
{
if(!@ARGV)
{
print STDERR "missing argument\n";
usage(-1);
}
$password=shift @ARGV;
$defaults_changed=$true;
}
elsif($arg =~ /^(-|--)(s|stars)$/i)
{
$noshow="stars";
$defaults_changed=$true;
}
elsif($arg =~ /^(-|--)(v|vis|visible)(=(\d+)|)$/i)
{
$noshow=$false;
if(length($4))
{
$maxshownlength=$4;
}
$defaults_changed=$true;
$defaults_changed_vis=$true;
}
elsif($arg =~ /^(-|--)(m|msg|message)$/i)
{
if(!@ARGV)
{
print STDERR "missing argument\n";
usage(-1);
}
$message=shift @ARGV;
if(length($message))
{
$message.="\n";
}
$defaults_changed=$true;
}
elsif($arg =~ /^(-|--)(mouse)$/i)
{
$mouse=$true;
}
else
{
usage(-1);
}
}
if(!$defaults_changed)
{
$noshow=$false;
}
if((!$defaults_changed || $defaults_changed_vis))
{
$message="Type '$password' to quit\n";
}
use Gtk2 -init;
my $w = new Gtk2::Window -popup;
my $l = new Gtk2::Label $message;
my $eb = new Gtk2::EventBox;
my $gdkwin;
my $grabstatus;
my $typed="";
sub do_grab()
{
$grabstatus= Gtk2::Gdk->keyboard_grab(
$gdkwin,$true,Gtk2::Gdk::X11->get_server_time($gdkwin) );
if($grabstatus ne "success")
{
$l->set_text("keyboard grab failed");
}
if($mouse)
{
$grabstatus= Gtk2::Gdk->pointer_grab(
$gdkwin,$true,['button-press-mask','button-release-mask'],undef,undef,Gtk2::Gdk::X11->get_server_time($gdkwin));
if($grabstatus ne "success")
{
$l->set_text("pointer grab failed");
}
}
}
sub do_ungrab()
{
Gtk2::Gdk->keyboard_ungrab(Gtk2::Gdk::X11->get_server_time($gdkwin));
if($mouse)
{
Gtk2::Gdk->pointer_ungrab(Gtk2::Gdk::X11->get_server_time($gdkwin));
}
}
sub do_keypress(@)
{
my ($widg,$evt)=@_;
my $kv = $evt->keyval;
my $cs = Gtk2::Gdk->keyval_name($kv);
if($cs =~ /Return|Enter/)
{
if($typed eq $password)
{
do_ungrab();
Gtk2->main_quit;
}
else
{
$typed="";
}
}
elsif(length($cs) == 1 && $cs =~ /[[:print:]]/)
{
$typed .= $cs;
}
my $showtyped=$typed;
if($noshow eq "stars")
{
$showtyped =~ s/[^*]/*/g;
}
elsif($noshow)
{
$showtyped="";
}
if(length($showtyped) > $maxshownlength)
{
$showtyped=substr($showtyped,0,$maxshownlength);
}
$l->set_text($message.$showtyped);
}
$w->add($eb);
$eb->add($l);
$w->add_events( [ qw(key_press_mask) ]);
$w->signal_connect('key_press_event', \&do_keypress);
$w->signal_connect('realize', sub { $w->window->move(@startpos); });
$w->signal_connect('map', sub { $gdkwin=$w->window; do_grab(); });
$w->show_all;
Gtk2->main;
Decompres file linked above and then give this permissions to execute
Code:
tar xvzf lock-keyboard-for-baby.pl.tar.gz
Code:
chmod +x lock-keyboard-for-baby.pl
that's all, to run type
Code:
perl lock-keyboard-for-baby.pl -mouse
(lock keyboard and mouse)
Code:
perl lock-keyboard-for-baby.pl
(lock keyboard, dont lock mouse)
open source rocks
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