getevent 源码

getevent源码，可用于测试Linux内核input事件

#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
//#include 
#include 
#include 
#include 
#include 

#include “getevent.h“

static struct pollfd *ufds;
static char **device_names;
static int nfds;

enum {
    PRINT_DEVICE_ERRORS     = 1U << 0
    PRINT_DEVICE            = 1U << 1
    PRINT_DEVICE_NAME       = 1U << 2
    PRINT_DEVICE_INFO       = 1U << 3
    PRINT_VERSION           = 1U << 4
    PRINT_POSSIBLE_EVENTS   = 1U << 5
    PRINT_INPUT_PROPS       = 1U << 6
    PRINT_HID_DEscriptOR    = 1U << 7

    PRINT_ALL_INFO          = （1U << 8） - 1

    PRINT_LABELS            = 1U << 16
};

static const char *get_label（const struct label *labels int value）
{
    while（labels->name && value != labels->value） {
        labels++;
    }
    return labels->name;
}

static int print_input_props（int fd）
{
    uint8_t bits[INPUT_PROP_CNT / 8];
    int i j;
    int res;
    int count;
    const char *bit_label;

    printf（“  input props:\n“）;
    res = ioctl（fd EVIOCGPROP（sizeof（bits）） bits）;
    if（res < 0） {
        printf（“            return 1;
    }
    count = 0;
    for（i = 0; i < res; i++） {
        for（j = 0; j < 8; j++） {
            if （bits[i] & 1 << j） {
                bit_label = get_label（input_prop_labels i * 8 + j）;
                if（bit_label）
                    printf（“    %s\n“ bit_label）;
                else
                    printf（“    %04x\n“ i * 8 + j）;
                count++;
            }
        }
    }
    if （!count）
        printf（“    \n“）;
    return 0;
}

static int print_possible_events（int fd int print_flags）
{
    uint8_t *bits = NULL;
    ssize_t bits_size = 0;
    const char* label;
    int i j k;
    int res res2;
    struct label* bit_labels;
    const char *bit_label;

    printf（“  events:\n“）;
    for（i = EV_KEY; i <= EV_MAX; i++） { // skip EV_SYN since we cannot query its available codes
        int count = 0;
        while（1） {
            res = ioctl（fd EVIOCGBIT（i bits_size） bits）;
            if（res < bits_size）
                break;
            bits_size = res + 16;
            bits = realloc（bits bits_size * 2）;
            if（bits == NULL） {
                fprintf（stderr “failed to allocate buffer of size %d\n“ （int）bits_size）;
                return 1;
            }
        }
        res2 = 0;
        switch（i） {
            case EV_KEY:
                res2 = ioctl（fd EVIOCGKEY（res） bits + bits_size）;
                label = “KEY“;
                bit_labels = key_labels;
                break;
            case EV_REL:
                label = “REL“;
                bit_labels = rel_labels;
                break;
            case EV_ABS:
                label = “ABS“;
                bit_labels = abs_labels;
                break;
            case EV_MSC:
            

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----
     目录           0  2016-08-22 05:37  Getevent-master\
     文件         526  2016-08-22 05:37  Getevent-master\Makefile
     文件          35  2016-08-22 05:37  Getevent-master\README.md
     目录           0  2016-08-22 05:37  Getevent-master\inc\
     文件       19028  2016-08-22 05:37  Getevent-master\inc\getevent.h
     目录           0  2016-08-22 05:37  Getevent-master\out\
     文件       45382  2016-08-22 05:37  Getevent-master\out\getevent
     目录           0  2016-08-22 05:37  Getevent-master\src\
     文件       21176  2016-08-22 05:37  Getevent-master\src\getevent.c