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  1. or download this
    #define EVIOCGRAB               _IOW('E', 0x90, int)                  
+  /* Grab/Release device */
  2. or download this
    open my $dev, "<", "/dev/input/event14" or die $!;
my $r = ioctl $dev, 0x90, 1;
print "$!\n" unless defined $r;
  3. or download this
    require "linux/input.ph";

open my $dev, "<", "/dev/input/event14" or die $!;
my $r = ioctl $dev, EVIOCGRAB(), 1;
print "$!\n" unless defined $r;