xenocara/xserver/hw/dmx/examples/ev.c

/*
 * Copyright 2002 Red Hat Inc., Durham, North Carolina.
 *
 * All Rights Reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation on the rights to use, copy, modify, merge,
 * publish, distribute, sublicense, and/or sell copies of the Software,
 * and to permit persons to whom the Software is furnished to do so,
 * subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the
 * next paragraph) shall be included in all copies or substantial
 * portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NON-INFRINGEMENT.  IN NO EVENT SHALL RED HAT AND/OR THEIR SUPPLIERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 *
 * This is a simple test program that reads from /dev/input/event*,
 * decoding events into a human readable form.
 */

/*
 * Authors:
 *   Rickard E. (Rik) Faith <faith@redhat.com>
 *
 */

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <sys/types.h>
#include <fcntl.h>
#include <errno.h>
#include <time.h>
#include <linux/input.h>

struct input_event event;

int
main(int argc, char **argv)
{
    char name[64];              /* RATS: Use ok, but could be better */
    char buf[256] = { 0, };     /* RATS: Use ok */
    unsigned char mask[EV_MAX / 8 + 1]; /* RATS: Use ok */
    int version;
    int fd = 0;
    int rc;
    int i, j;
    char *tmp;

#define test_bit(bit) (mask[(bit)/8] & (1 << ((bit)%8)))

    for (i = 0; i < 32; i++) {
        snprintf(name, sizeof(name), "/dev/input/event%d", i);
        if ((fd = open(name, O_RDONLY, 0)) >= 0) {
            ioctl(fd, EVIOCGVERSION, &version);
            ioctl(fd, EVIOCGNAME(sizeof(buf)), buf);
            ioctl(fd, EVIOCGBIT(0, sizeof(mask)), mask);
            printf("%s\n", name);
            printf("    evdev version: %d.%d.%d\n",
                   version >> 16, (version >> 8) & 0xff, version & 0xff);
            printf("    name: %s\n", buf);
            printf("    features:");
            for (j = 0; j < EV_MAX; j++) {
                if (test_bit(j)) {
                    const char *type = "unknown";

                    switch (j) {
                    case EV_KEY:
                        type = "keys/buttons";
                        break;
                    case EV_REL:
                        type = "relative";
                        break;
                    case EV_ABS:
                        type = "absolute";
                        break;
                    case EV_MSC:
                        type = "reserved";
                        break;
                    case EV_LED:
                        type = "leds";
                        break;
                    case EV_SND:
                        type = "sound";
                        break;
                    case EV_REP:
                        type = "repeat";
                        break;
                    case EV_FF:
                        type = "feedback";
                        break;
                    }
                    printf(" %s", type);
                }
            }
            printf("\n");
            close(fd);
        }
    }

    if (argc > 1) {
        snprintf(name, sizeof(name), "/dev/input/event%d", atoi(argv[1]));
        if ((fd = open(name, O_RDWR, 0)) >= 0) {
            printf("%s: open, fd = %d\n", name, fd);
            for (i = 0; i < LED_MAX; i++) {
                event.time.tv_sec = time(0);
                event.time.tv_usec = 0;
                event.type = EV_LED;
                event.code = i;
                event.value = 0;
                write(fd, &event, sizeof(event));
            }

            while ((rc = read(fd, &event, sizeof(event))) > 0) {
                printf("%-24.24s.%06lu type 0x%04x; code 0x%04x;"
                       " value 0x%08x; ",
                       ctime(&event.time.tv_sec),
                       event.time.tv_usec, event.type, event.code, event.value);
                switch (event.type) {
                case EV_KEY:
                    if (event.code > BTN_MISC) {
                        printf("Button %d %s",
                               event.code & 0xff,
                               event.value ? "press" : "release");
                    }
                    else {
                        printf("Key %d (0x%x) %s",
                               event.code & 0xff,
                               event.code & 0xff,
                               event.value ? "press" : "release");
                    }
                    break;
                case EV_REL:
                    switch (event.code) {
                    case REL_X:
                        tmp = "X";
                        break;
                    case REL_Y:
                        tmp = "Y";
                        break;
                    case REL_HWHEEL:
                        tmp = "HWHEEL";
                        break;
                    case REL_DIAL:
                        tmp = "DIAL";
                        break;
                    case REL_WHEEL:
                        tmp = "WHEEL";
                        break;
                    case REL_MISC:
                        tmp = "MISC";
                        break;
                    default:
                        tmp = "UNKNOWN";
                        break;
                    }
                    printf("Relative %s %d", tmp, event.value);
                    break;
                case EV_ABS:
                    switch (event.code) {
                    case ABS_X:
                        tmp = "X";
                        break;
                    case ABS_Y:
                        tmp = "Y";
                        break;
                    case ABS_Z:
                        tmp = "Z";
                        break;
                    case ABS_RX:
                        tmp = "RX";
                        break;
                    case ABS_RY:
                        tmp = "RY";
                        break;
                    case ABS_RZ:
                        tmp = "RZ";
                        break;
                    case ABS_THROTTLE:
                        tmp = "THROTTLE";
                        break;
                    case ABS_RUDDER:
                        tmp = "RUDDER";
                        break;
                    case ABS_WHEEL:
                        tmp = "WHEEL";
                        break;
                    case ABS_GAS:
                        tmp = "GAS";
                        break;
                    case ABS_BRAKE:
                        tmp = "BRAKE";
                        break;
                    case ABS_HAT0X:
                        tmp = "HAT0X";
                        break;
                    case ABS_HAT0Y:
                        tmp = "HAT0Y";
                        break;
                    case ABS_HAT1X:
                        tmp = "HAT1X";
                        break;
                    case ABS_HAT1Y:
                        tmp = "HAT1Y";
                        break;
                    case ABS_HAT2X:
                        tmp = "HAT2X";
                        break;
                    case ABS_HAT2Y:
                        tmp = "HAT2Y";
                        break;
                    case ABS_HAT3X:
                        tmp = "HAT3X";
                        break;
                    case ABS_HAT3Y:
                        tmp = "HAT3Y";
                        break;
                    case ABS_PRESSURE:
                        tmp = "PRESSURE";
                        break;
                    case ABS_DISTANCE:
                        tmp = "DISTANCE";
                        break;
                    case ABS_TILT_X:
                        tmp = "TILT_X";
                        break;
                    case ABS_TILT_Y:
                        tmp = "TILT_Y";
                        break;
                    case ABS_MISC:
                        tmp = "MISC";
                        break;
                    default:
                        tmp = "UNKNOWN";
                        break;
                    }
                    printf("Absolute %s %d", tmp, event.value);
                    break;
                case EV_MSC:
                    printf("Misc");
                    break;
                case EV_LED:
                    printf("Led");
                    break;
                case EV_SND:
                    printf("Snd");
                    break;
                case EV_REP:
                    printf("Rep");
                    break;
                case EV_FF:
                    printf("FF");
                    break;
                    break;
                }
                printf("\n");
            }
            printf("rc = %d, (%s)\n", rc, strerror(errno));
            close(fd);
        }
    }
    return 0;
}