Function esp_idf_sys::scandir

pub unsafe extern "C" fn scandir(
    dirname: *const c_char,
    out_dirlist: *mut *mut *mut dirent,
    select_func: Option<unsafe extern "C" fn(arg1: *const dirent) -> c_int>,
    cmp_func: Option<unsafe extern "C" fn(arg1: *mut *const dirent, arg2: *mut *const dirent) -> c_int>,
) -> c_int