要改进这个问题吗? 更新了问题 ,因此堆积溢流的回答是
Closed 11 years ago.
我发现所有者: / mpt/ sdcard 下的文件组总是系统: sdcard_rw。 即使我支持 root 创建一个文件, 所有人仍然是系统: sdcard_rw 。
/ mp/ sdcard 下的文件有什么特别之处吗?
Sdcard 上的文件系统可能是 vfat (fat32), 它不存储用户和组的信息。 使用挂载点的所有者和组 。
用户和组由挂载选项定义。 以下是我的 AVD 的样本挂载输出 :
/dev/block/vold/179:0 /mnt/sdcard vfat rw,dirsync,nosuid,nodev,noexec,uid=1000,gid=1015,fmask=0702,dmask=0702,allow_utime=0020,codepage=cp437,iocharset=iso885
SD卡通常以 FAT32 格式格式格式格式,不支持设置文件的访问权限。
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