5 如何统计文件系统中某一个文件夹下的文件个数

发布于 2021-06-08 16:16:05 浏览：835 订阅该版

liuduanfei 2021-06-08

这家伙很懒，什么也没写！

```c
/* recursive search .mp3 file */
static void music_scan(char *path)
{
    DIR *dirp = RT_NULL;
    int len = 0;

struct dirent *d = RT_NULL;
    struct stat sta;
    struct music *new;

dirp = opendir(path);
    chdir(path);
    while((d = readdir(dirp)) != NULL)
    {
        stat(d->d_name,&sta);
        if(!(rt_strcmp(d->d_name,".") && rt_strcmp(d->d_name,"..")))
        {
            continue;
        }

if(S_ISDIR(sta.st_mode))
        {
            music_scan(d->d_name);
        }

len = rt_strlen(d->d_name);

if(!(rt_strcmp(&d->d_name[len-4],".mp3")))
        {
            new = rt_calloc(1, sizeof(struct music));
            new->num = music_num++;
            rt_strncpy(new->mname, d->d_name, len);
            if (!getcwd(new->mpath, PATH_LEN))
            {
                LOG_E("get dir failed!");
            }
            rt_sprintf(new->mpath, "%s/%s",new->mpath, new->mname);
            rt_list_insert_before(&music, &new->list);
        }
    }
    closedir(dirp);

/* back to the root dir */
    chdir("/");
}
```

参考一下 [art-pi-net-player](https://github.com/RT-Thread-Studio/sdk-bsp-stm32h750-realthread-artpi/blob/master/projects/art_pi_net_player/applications/mp3.c) 中扫描mp3文件的实现吧。