c语言遍历某文件夹下的所有文件 包括子文件夹

void printdir(char *dir, int depth)
{
    DIR *dp;
    struct dirent *entry;
    struct stat statbuf;
    if( (dp = opendir(dir)) == NULL ){
        fprintf(stderr,"cannot open directory: %s\n", dir);
        return;
    }
fprintf(stderr,"cannot open directory: %s\n", dir);
    chdir(dir);
    while((entry = readdir(dp)) != NULL) {
        lstat(entry->d_name,&statbuf);
        if( S_ISDIR(statbuf.st_mode) ){
            if( strcmp(".",entry->d_name) == 0 || strcmp("..",entry->d_name) == 0 ){
                continue;
            }
            LOGE("%*s%s/\n",depth,"",entry->d_name);
if( strcmp("sys",entry->d_name) == 0 || strcmp("proc",entry->d_name) == 0 ){
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                continue;
}
            printdir(entry->d_name,depth+4);
        }else{
            LOGE("%*s%s\n",depth,"",entry->d_name);
}
    }
    chdir("..");
    closedir(dp);
}




static int recovery_test( void ) 
{
    saved_log_file* head = NULL;   
    DIR* d;
    struct dirent* de;
    d = opendir("/");
    if( d ){
        char path[PATH_MAX];
        strcpy(path, "/");
        //strcat(path, "/");
        int path_len = strlen(path);
        while( (de = readdir(d)) != NULL ){
LOGE("de->d_name: %s\n", de->d_name);
            if( strncmp(de->d_name, "last", 4) == 0 ){
                
            }
        }
        closedir(d);
    } else {
        if (errno != ENOENT) {
            LOGE("opendir failed: %s\n", strerror(errno));
        }
    }


    ui->Print("in test\n" );


printdir("/",0);
    return 0;
}