recovery中如何挂载sdcard

recovery中手机盘使用mnt/sdcard 或者使用storage/emulated/0/这些都不行。因为手机在recovery中的挂载点跟系统启动起来是不一样的。

1：可以查看fstab，查看手机挂载点。

2：如果在recovery中挂载不上sdcard，可以手动挂载一下，方法如下：

   ensure_path_mounted("/sdcard");

int ensure_path_mounted(const char* path) {     // Mount at the default mount point.     return ensure_path_mounted_at(path, nullptr); }

int ensure_path_unmounted(const char* path) {     Volume* v = volume_for_path(path);     if (v == NULL) {         LOGE("unknown volume for path [%s]\n", path);         return -1;     }     if (strcmp(v->fs_type, "ramdisk") == 0) {         // the ramdisk is always mounted; you can't unmount it.         return -1;     }

    int result;     result = scan_mounted_volumes();     if (result < 0) {         LOGE("failed to scan mounted volumes\n");         return -1;     }

    const MountedVolume* mv =         find_mounted_volume_by_mount_point(v->mount_point);     if (mv == NULL) {         // volume is already unmounted         return 0;     }

    return unmount_mounted_volume(mv); }