使用inotify获取usb设备插拔事件,并提取出设备类型，名字，pid vid 文件路径等信息，不使用libudev，请用C语言写出程序

好的，以下是使用inotify获取usb设备插拔事件并提取设备信息的C语言程序：

#include <stdio.h>
#include <stdlib.h>
#include <sys/inotify.h>
#include <string.h>

#define EVENT_SIZE (sizeof(struct inotify_event))
#define BUF_LEN (1024 * (EVENT_SIZE + 16))

int main(void)
{
    int fd, wd;
    char buf[BUF_LEN];
    int len, i = 0;
    struct inotify_event *event;

    fd = inotify_init();
    if (fd < 0) {
        perror("inotify_init");
        return EXIT_FAILURE;
    }

    wd = inotify_add_watch(fd, "/dev/", IN_CREATE | IN_DELETE);
    if (wd < 0) {
        perror("inotify_add_watch");
        return EXIT_FAILURE;
    }

    while (1) {
        len = read(fd, buf, BUF_LEN);
        if (len < 0) {
            perror("read");
            return EXIT_FAILURE;
        }

        i = 0;
        while (i < len) {
            event = (struct inotify_event *)&buf[i];
            if (event->mask & (IN_CREATE | IN_DELETE)) {
                if (strstr(event->name, "usb")) {
                    char sys_path[256];
                    char vid[5], pid[5];
                    char *devname;
                    FILE *fp;

                    sprintf(sys_path, "/sys/class/%s/%s/device/uevent", event->name, event->name);

                    fp = fopen(sys_path, "r");
                    if (fp == NULL) {
                        perror("fopen");
                        return EXIT_FAILURE;
                    }

                    while (fgets(buf, sizeof(buf), fp)) {
                        if (strstr(buf, "PRODUCT=")) {
                            sscanf(buf, "PRODUCT=%4s/%4s/", vid, pid);
                        } else if (strstr(buf, "DEVNAME=")) {
                            buf[strlen(buf) - 1] = '\0';
                            devname = strrchr(buf, '/');
                            printf("Device %s %s (VID=%s PID=%s)\n", event->mask & IN_CREATE ? "added" : "removed", devname + 1, vid, pid);
                        }
                    }

                    fclose(fp);
                }
            }
            i += EVENT_SIZE + event->len;
        }
    }

    inotify_rm_watch(fd, wd);
    close(fd);

    return EXIT_SUCCESS;
}

程序中使用inotify监听/dev/目录下的IN_CREATE和IN_DELETE事件，并检查设备名是否带有“usb”字符串。如果是，则根据/sys/class/目录下的相应设备目录中的uevent文件提取出设备的VID、PID、设备名等信息并打印出来。