mirror of
https://gitlab.freedesktop.org/libevdev/libevdev.git
synced 2025-12-20 12:40:07 +01:00
f3d94ecfd7
Callbacks looked good on paper, but synaptics ran into an issue already that it just couldn't easily pass around the state needed in the actual event processing function. Replace with a new interface that only returns the next event (still reading more off the fd while doing so). Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
121 lines
3.1 KiB
C
121 lines
3.1 KiB
C
/*
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* Copyright © 2013 Red Hat, Inc.
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*
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* Permission to use, copy, modify, distribute, and sell this software and its
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* documentation for any purpose is hereby granted without fee, provided that
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* the above copyright notice appear in all copies and that both that copyright
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* notice and this permission notice appear in supporting documentation, and
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* that the name of the copyright holders not be used in advertising or
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* publicity pertaining to distribution of the software without specific,
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* written prior permission. The copyright holders make no representations
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* about the suitability of this software for any purpose. It is provided "as
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* is" without express or implied warranty.
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*
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* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
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* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
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* EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
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* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
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* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
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* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
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* OF THIS SOFTWARE.
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*/
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#include <config.h>
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#include <stdio.h>
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#include <string.h>
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#include <errno.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <assert.h>
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#include <linux/input.h>
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#include "libevdev.h"
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#include "event-names.h"
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void
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print_code_bits(struct libevdev *dev, unsigned int type, unsigned int max)
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{
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unsigned int i;
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for (i = 0; i <= max; i++) {
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if (libevdev_has_event_code(dev, type, i))
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printf("%s: %s\n",
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event_get_type_name(type),
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event_get_code_name(type, i));
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}
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}
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int print_event(struct input_event *ev)
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{
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if (ev->type == EV_SYN)
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printf("Event: time %ld.%06ld, ++++++++++++++++++++ %s +++++++++++++++\n",
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ev->time.tv_sec,
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ev->time.tv_usec,
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event_get_type_name(ev->type));
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else
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printf("Event: time %ld.%06ld, type %d (%s), code %d (%s), value %d\n",
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ev->time.tv_sec,
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ev->time.tv_usec,
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ev->type,
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event_get_type_name(ev->type),
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ev->code,
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event_get_code_name(ev->type, ev->code),
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ev->value);
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return 0;
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}
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int print_sync_event(struct input_event *ev)
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{
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printf("SYNC: ");
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print_event(ev);
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return 0;
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}
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int
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main(int argc, char **argv)
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{
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struct libevdev *dev = NULL;
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const char *file;
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int fd;
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int rc = 1;
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if (argc < 2)
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goto out;
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file = argv[1];
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fd = open(file, O_RDONLY | O_NONBLOCK);
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if (fd < 0) {
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perror("Failed to open device");
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goto out;
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}
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dev = libevdev_new(fd);
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if (!dev) {
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fprintf(stderr, "Failed to init libevdev\n");
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goto out;
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}
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do {
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struct input_event ev;
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rc = libevdev_next_event(dev, 0, &ev);
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if (rc == 1) {
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printf("::::::::::::::::::::: dropped ::::::::::::::::::::::\n");
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while (rc == 1) {
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print_sync_event(&ev);
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rc = libevdev_next_event(dev, ER_SYNC, &ev);
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}
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printf("::::::::::::::::::::: re-synced ::::::::::::::::::::::\n");
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} else if (rc == 0)
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print_event(&ev);
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} while (rc == 1 || rc == 0 || rc == -EAGAIN);
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if (rc != 0 && rc != -EAGAIN)
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fprintf(stderr, "Failed to handle events: %s\n", strerror(rc));
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rc = 0;
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out:
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libevdev_free(dev);
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return rc;
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}
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