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android 不打开Shared sdcard功能,内置SD卡中预制资源,删除资源,恢复出厂设置恢复

当有内置SD卡,且不打开shared sdcard功能的情况下,需要在SD卡中预置一些客户资源。
这些资源end user可见,也可删除。在资源被user删除之后,执行恢复出厂设置功能,需要恢复这些预置资源。


1. 预置同样的资源到user不可见的分区,如/system下。
在alps\vendor\mediatek\project_name\artifacts\out\target\product\your_project_name\system\ 下创建目录,
将预制资源放于此目录下,重新build new之后,system image中就带有预制资源。
 
2. recovery结束,拷贝资源到SD卡上。
在recovery main函数的结尾,也就是恢复出厂设置,或者SD卡升级之后,通过客制化函数,将特定的文件copy到SD卡下。
 
int
main(int argc, char **argv) {
...
    //添加这个客制化函数用来恢复特定文件夹下的所有文件,包括子目录,这里是案例:/data/app/  --->  /sdcard/app/
    recovery_restore_special("/sdcard/app", "/data/app");
 
    // Otherwise, get ready to boot the main system...
    finish_recovery(send_intent);
    ui->Print("Rebooting...\n");
    property_set(ANDROID_RB_PROPERTY, "reboot,");
    return EXIT_SUCCESS;
}
 
int recovery_restore_special(char *des_dir_path, char *src_dir_path)
{
 int ret= 0;
 printf("\n\n++ %s ++\n\n", __func__);
 printf("src dir:%s\n", src_dir_path);
 printf("des dir:%s\n", des_dir_path);
 //mount path
 ret = ensure_path_mounted(src_dir_path);
 if(ret < 0) {
  printf("mount src dir error:%s\n", src_dir_path);
  return -1;
 }
 printf("mount:%s ret=%d\n", src_dir_path, ret);
 
 ret = ensure_path_mounted(des_dir_path);
 if(ret < 0) {
  printf("mount des dir error:%s\n", des_dir_path);
  ensure_path_unmounted(src_dir_path);
  return -1;
 }
 printf("mount:%s ret=%d\n", des_dir_path, ret);
 //restore dir and file
 ret = restore_dir_file(des_dir_path, src_dir_path);
 printf("restore ret=%d\n", ret);
 
 //unmount
 ensure_path_unmounted(src_dir_path);
 ensure_path_unmounted(des_dir_path);
 printf("\n\n-- %s --\n\n", __func__);
 return 0;
}
 
static int restore_dir_file(char *des_dir_path, char *src_dir_path)
{
 int ret= 0;
 DIR* dir_des = NULL;
 DIR* dir_src = http://www.mamicode.com/NULL;
 struct dirent* de_des = NULL;
 struct dirent* de_src = http://www.mamicode.com/NULL;
 FILE * fdes = NULL;
 FILE * fsrc = http://www.mamicode.com/NULL;
 char src_file_path[256] = {0};
 char des_file_path[256] = {0};
 char buf[256] = {0};
 int name_len = 0;
 int size = 0, file_len = 0;
 printf("\n\nenter, %s \n\n", __func__);
 printf("src dir:%s\n", src_dir_path);
 printf("des dir:%s\n", des_dir_path);
 //open dir
 dir_src = http://www.mamicode.com/opendir(src_dir_path);
 if(dir_src =http://www.mamicode.com/= NULL) {
  printf("open src dir error:%s\n", src_dir_path);
  return -1;
 }
 dir_des = opendir(des_dir_path);
 if(dir_des == NULL) {
  ret = -1;
  if(errno == ENOENT) {
   printf("des dir not exist:%s\n", des_dir_path);
   ret = mkdir(des_dir_path, (S_IRWXU | S_IRWXG | S_IRWXO));
  }
  if(ret < 0) {
   closedir(dir_src);
   printf("open des dir error:%s\n", des_dir_path);
   return -1;
  }
  else {
   printf("mkdir des dir:%s\n", des_dir_path);
   dir_des = opendir(des_dir_path);
  }
 }
 printf("dir_src=http://www.mamicode.com/%d, dir_des=%d/n", dir_src, dir_des);
 while ((de_src = http://www.mamicode.com/readdir(dir_src)) != NULL) {
  printf("d_name: %s\n", de_src->d_name);
  
  if (de_src->d_type == DT_DIR) {
   name_len = strlen(de_src->d_name);
   
   // skip "." and ".." entries
   if ((name_len == 1 && de_src->d_name[0] == ‘.‘) ||
    (name_len == 2 && de_src->d_name[0] == ‘.‘ && de_src->d_name[1] == ‘.‘)) {
    continue;
   }
            else {
    //src dir path append the folder‘s d_name
    sprintf(src_file_path, "%s/%s", src_dir_path, de_src->d_name);
    printf("src dir path: %s\n", src_file_path);
    //des dir path append the folder‘s d_name
    sprintf(des_file_path, "%s/%s", des_dir_path, de_src->d_name);
    printf("des dir path: %s\n", des_file_path);
    printf("---entry sub dir to restore\n");
    ret = restore_dir_file(des_file_path, src_file_path);
    printf("sub dir restore ret=%d\n", ret);
            }
  }
  else if (de_src->d_type == DT_REG) {
   //open src file
   sprintf(src_file_path, "%s/%s", src_dir_path, de_src->d_name);
   printf("src_file_path: %s\n", src_file_path);
   fsrc = http://www.mamicode.com/fopen(src_file_path, "r");
   printf("fsrc=http://www.mamicode.com/%d/n", fsrc);
   //create des file
   sprintf(des_file_path, "%s/%s", des_dir_path, de_src->d_name);
   printf("des_file_path: %s\n", des_file_path);
   fdes = fopen_path(des_file_path, "w");
   printf("fdes=%d\n", fdes);
   //read from src file, write to des file
   file_len= 0;
   while (!feof(fsrc)) {
    size = fread(buf, sizeof(char), sizeof(buf), fsrc);
    fwrite(buf, sizeof(char), size, fdes);
    memset(buf, 0, sizeof(buf));
    file_len += size;
   }
   fflush(fdes);
   printf("%s: file_len=%d\n", de_src->d_name, file_len);
   
   //close file
   fclose(fsrc);
   fclose(fdes);
  }
 }
 //close dir
 closedir(dir_src);
 closedir(dir_des);
 
 printf("\n\nexit, %s \n\n", __func__);
 return 0;
}
 

android 不打开Shared sdcard功能,内置SD卡中预制资源,删除资源,恢复出厂设置恢复