링크 ux hidraw 장치 c 언어 버 전 찾기

///------
///    sudo   
///    /dev   ，   hidraw   ，      
///------







/* Linux */
#include 
#include 
#include 
#include 

#ifndef HIDIOCSFEATURE
#warning Please have your distro update the userspace kernel headers
#define HIDIOCSFEATURE(len)    _IOC(_IOC_WRITE|_IOC_READ, 'H', 0x06, len)
#define HIDIOCGFEATURE(len)    _IOC(_IOC_WRITE|_IOC_READ, 'H', 0x07, len)
#endif

/* Unix */
#include 
#include 
#include 
#include 
#include 

/* C */
#include 
#include 
#include 
#include 

const char *bus_str(int bus);


#define HID_RAW "/dev/hidraw"

int main(int argc, char **argv)
{
    printf("\033[1;31;43m run this need sudo !!! \033[0;m  
");

    int fd;
    int i, res, desc_size = 0;
    char buf[256];
    struct hidraw_report_descriptor rpt_desc;
    struct hidraw_devinfo info;
    char device[32] = HID_RAW;
    DIR *dir = NULL;
    struct dirent *ptr;

    /* Open dir /dev. */
    dir = opendir("/dev");//-------------------------------------------------  /dev  。
    if(!dir) {
        perror("Popen dir failed...");
        return -ENOENT;
    }

    /*  */
    while(ptr = readdir(dir)) {//--  /dev        。
	if(ptr->d_type != DT_CHR){//--           ，      DT_UNKNOWN/DT_FIFO/DT_CHR DT_DIR/DT_BLK/DT_REG/DT_LNK/DT_SOCK/DT_WHT。        
 		continue;
	}   
	if(!strncmp(ptr->d_name, "hidraw", 6)) {//--  hidraw  

            snprintf(device, sizeof(device), "%s/%s", "/dev", ptr->d_name);

            /* Open the Device with non-blocking reads. In real life,
               don't use a hard coded path; use libudev instead. */
            fd = open(device, O_RDWR|O_NONBLOCK);//--------------------------  hidraw  ，     hidraw_open()。
            if (fd < 0) {
                printf("\033[1;31;43m Unable to open device %s \033[0;m  
", device);
		printf("\033[1;31;43m run this need sudo !!! \033[0;m  
");
                return 1;
            }

            memset(&rpt_desc, 0x0, sizeof(rpt_desc));
            memset(&info, 0x0, sizeof(info));
            memset(buf, 0x0, sizeof(buf));

            printf("

=================================Device %s info=================================
", device);
            /* Get Raw Name */
            res = ioctl(fd, HIDIOCGRAWNAME(256), buf);//---------------------  hidraw_ioctl() HIDIOCGRAWNAME。
            if (res < 0)
                perror("HIDIOCGRAWNAME");
            else
                printf("Raw Name: %s
", buf);

            /* Get Physical Location */
            res = ioctl(fd, HIDIOCGRAWPHYS(256), buf);//---------------------  HIDIOCGRAWPHYS。
            if (res < 0)
                perror("HIDIOCGRAWPHYS");
            else
                printf("Raw Phys: %s
", buf);

            /* Get Raw Info */
            res = ioctl(fd, HIDIOCGRAWINFO, &info);//-------------------------  HIDIOCGRAWINFO。
            if (res < 0) {
                perror("HIDIOCGRAWINFO");
            } else {
                printf("Raw Info:
");
                printf("\tbustype: %d (%s)
",
                    info.bustype, bus_str(info.bustype));
                printf("\tvendor: 0x%04hx
", info.vendor);
                printf("\tproduct: 0x%04hx
", info.product);
            }

            /* Get Report Descriptor Size */
            res = ioctl(fd, HIDIOCGRDESCSIZE, &desc_size);//------------------  HIDIOCGRDESCSIZE
            if (res < 0)
                perror("HIDIOCGRDESCSIZE");
            else
                printf("Report Descriptor Size: %d
", desc_size);

            /* Get Report Descriptor */
            rpt_desc.size = desc_size;
            res = ioctl(fd, HIDIOCGRDESC, &rpt_desc);//------------------------  HIDIOCGRDESC。
            if (res < 0) {
                perror("HIDIOCGRDESC");
            } else {
                printf("Report Descriptor:
");
                for (i = 0; i < rpt_desc.size; i++)
                    printf("%hhx ", rpt_desc.value[i]);
                puts("
");
            }

            /* Set Feature */
            buf[0] = 0x9; /* Report Number */
            buf[1] = 0xff;
            buf[2] = 0xff;
            buf[3] = 0xff;
            res = ioctl(fd, HIDIOCSFEATURE(4), buf);//-------------------------  HIDIOCSFEATURE。
            if (res < 0)
                perror("HIDIOCSFEATURE");
            else
                printf("ioctl HIDIOCGFEATURE returned: %d
", res);

            /* Get Feature */
            buf[0] = 0x9; /* Report Number */
            res = ioctl(fd, HIDIOCGFEATURE(256), buf);//-----------------------  HIDIOCGFEATURE。
            if (res < 0) {
                perror("HIDIOCGFEATURE");
            } else {
                printf("ioctl HIDIOCGFEATURE returned: %d
", res);
                printf("Report data (not containing the report number):
\t");
                for (i = 0; i < res; i++)
                    printf("%hhx ", buf[i]);
                puts("
");
            }

            /* Send a Report to the Device */
            buf[0] = 0x1; /* Report Number */
            buf[1] = 0x77;
            res = write(fd, buf, 2);
            if (res < 0) {
                printf("Error: %d
", errno);
                perror("write");
            } else {
                printf("write() wrote %d bytes
", res);
            }

            /* Get a report from the device */
            res = read(fd, buf, 16);
            if (res < 0) {
                perror("read");
            } else {
                printf("read() read %d bytes:
\t", res);
                for (i = 0; i < res; i++)
                    printf("%hhx ", buf[i]);
                puts("
");
            }

            close(fd);
        }
    }
    return 0;
}

const char *
bus_str(int bus)
{
    switch (bus) {
    case BUS_USB:
        return "USB";
        break;
    case BUS_HIL:
        return "HIL";
        break;
    case BUS_BLUETOOTH:
        return "Bluetooth";
        break;
    case BUS_VIRTUAL:
        return "Virtual";
        break;
    default:
        return "Other";
        break;
    }
}