/usr/src/speakup-3.1.5.dfsg.1/fakekey.c is in speakup 3.1.5.dfsg.1-1ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 | /* fakekey.c
* Functions for simulating keypresses.
*
* Copyright (C) 2010 the Speakup Team
*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <linux/types.h>
#include <linux/slab.h>
#include <linux/preempt.h>
#include <linux/percpu.h>
#include <linux/input.h>
#include "speakup.h"
#define PRESSED 1
#define RELEASED 0
DEFINE_PER_CPU(bool, reporting_keystroke);
static struct input_dev *virt_keyboard;
int speakup_add_virtual_keyboard(void)
{
int err;
virt_keyboard = input_allocate_device();
if (!virt_keyboard)
return -ENOMEM;
virt_keyboard->name = "Speakup";
virt_keyboard->id.bustype = BUS_VIRTUAL;
virt_keyboard->phys = "speakup/input0";
virt_keyboard->dev.parent = NULL;
__set_bit(EV_KEY, virt_keyboard->evbit);
__set_bit(KEY_DOWN, virt_keyboard->keybit);
err = input_register_device(virt_keyboard);
if (err) {
input_free_device(virt_keyboard);
virt_keyboard = NULL;
}
return err;
}
void speakup_remove_virtual_keyboard(void)
{
if (virt_keyboard != NULL) {
input_unregister_device(virt_keyboard);
input_free_device(virt_keyboard);
virt_keyboard = NULL;
}
}
/*
* Send a simulated down-arrow to the application.
*/
void speakup_fake_down_arrow(void)
{
unsigned long flags;
/* disable keyboard interrupts */
local_irq_save(flags);
/* don't change CPU */
preempt_disable();
__get_cpu_var(reporting_keystroke) = true;
input_report_key(virt_keyboard, KEY_DOWN, PRESSED);
input_report_key(virt_keyboard, KEY_DOWN, RELEASED);
__get_cpu_var(reporting_keystroke) = false;
/* reenable preemption */
preempt_enable();
/* reenable keyboard interrupts */
local_irq_restore(flags);
}
/*
* Are we handling a simulated keypress on the current CPU?
* Returns a boolean.
*/
bool speakup_fake_key_pressed(void)
{
bool is_pressed;
is_pressed = get_cpu_var(reporting_keystroke);
put_cpu_var(reporting_keystroke);
return is_pressed;
}
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