mirror of
https://gitlab.freedesktop.org/libevdev/libevdev.git
synced 2025-12-20 15:00:06 +01:00
a3255d3ec7
Two main goals of this library: - 'transparently' handle SYN_DROPPED events - avoid errors in ioctl handling by providing a simpler interface. Keeps a cached copy of the device for quick querying. Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
120 lines
3.2 KiB
C
120 lines
3.2 KiB
C
/*
|
|
* Copyright © 2013 Red Hat, Inc.
|
|
*
|
|
* Permission to use, copy, modify, distribute, and sell this software and its
|
|
* documentation for any purpose is hereby granted without fee, provided that
|
|
* the above copyright notice appear in all copies and that both that copyright
|
|
* notice and this permission notice appear in supporting documentation, and
|
|
* that the name of the copyright holders not be used in advertising or
|
|
* publicity pertaining to distribution of the software without specific,
|
|
* written prior permission. The copyright holders make no representations
|
|
* about the suitability of this software for any purpose. It is provided "as
|
|
* is" without express or implied warranty.
|
|
*
|
|
* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
|
|
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
|
|
* EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
|
|
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
|
|
* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
|
|
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
|
|
* OF THIS SOFTWARE.
|
|
*/
|
|
|
|
#include <config.h>
|
|
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <errno.h>
|
|
#include <sys/types.h>
|
|
#include <sys/stat.h>
|
|
#include <fcntl.h>
|
|
#include <assert.h>
|
|
#include <linux/input.h>
|
|
|
|
#include "libevdev.h"
|
|
#include "event-names.h"
|
|
|
|
void
|
|
print_code_bits(struct libevdev *dev, unsigned int type, unsigned int max)
|
|
{
|
|
unsigned int i;
|
|
for (i = 0; i <= max; i++) {
|
|
if (libevdev_has_event_code(dev, type, i))
|
|
printf("%s: %s\n",
|
|
event_get_type_name(type),
|
|
event_get_code_name(type, i));
|
|
}
|
|
}
|
|
|
|
int callback(struct libevdev *dev, struct input_event *ev, void *userdata)
|
|
{
|
|
if (ev->type == EV_SYN)
|
|
printf("Event: time %ld.%06ld, ++++++++++++++++++++ %s +++++++++++++++\n",
|
|
ev->time.tv_sec,
|
|
ev->time.tv_usec,
|
|
event_get_type_name(ev->type));
|
|
else
|
|
printf("Event: time %ld.%06ld, type %d (%s), code %d (%s), value %d\n",
|
|
ev->time.tv_sec,
|
|
ev->time.tv_usec,
|
|
ev->type,
|
|
event_get_type_name(ev->type),
|
|
ev->code,
|
|
event_get_code_name(ev->type, ev->code),
|
|
ev->value);
|
|
return 0;
|
|
}
|
|
|
|
int sync_callback(struct libevdev *dev, struct input_event *ev, void *userdata)
|
|
{
|
|
printf("SYNC: ");
|
|
callback(dev, ev, userdata);
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
main(int argc, char **argv)
|
|
{
|
|
struct libevdev *dev = NULL;
|
|
const char *file;
|
|
int fd;
|
|
int rc = 1;
|
|
|
|
if (argc < 2)
|
|
goto out;
|
|
|
|
file = argv[1];
|
|
fd = open(file, O_RDONLY | O_NONBLOCK);
|
|
if (fd < 0) {
|
|
perror("Failed to open device");
|
|
goto out;
|
|
}
|
|
|
|
dev = libevdev_new(fd);
|
|
if (!dev) {
|
|
fprintf(stderr, "Failed to init libevdev\n");
|
|
goto out;
|
|
}
|
|
|
|
if (libevdev_set_callbacks(dev, &callback, &sync_callback, NULL) != 0) {
|
|
fprintf(stderr, "Failed to set callbacks");
|
|
goto out;
|
|
}
|
|
|
|
do {
|
|
rc = libevdev_read_events(dev, ER_ALL);
|
|
if (rc == 1) {
|
|
printf("::::::::::::::::::::: dropped ::::::::::::::::::::::\n");
|
|
rc = libevdev_read_events(dev, ER_ALL | ER_SYNC);
|
|
}
|
|
} while (rc == 1 || rc == 0 || rc == -EAGAIN);
|
|
|
|
if (rc != 0 && rc != -EAGAIN)
|
|
fprintf(stderr, "Failed to handle events: %s\n", strerror(rc));
|
|
|
|
rc = 0;
|
|
out:
|
|
libevdev_free(dev);
|
|
|
|
return rc;
|
|
}
|