检查文件是否可读可写

Question

我正在尝试编写一个脚本来查找保存到我桌面的某个 .txt 文件。我希望脚本能够检查此文件是否存在，然后检查它是否可读和可写。

任何提示？

Answer 1

你不需要检查它是否存在，检查读写权限就足够了：

来自help test，精选的相关测试：

-a FILE        True if file exists.
-e FILE        True if file exists.
-f FILE        True if file exists and is a regular file.
-r FILE        True if file is readable by you.
-s FILE        True if file exists and is not empty.
-w FILE        True if the file is writable by you.

所以你可以试试：

-a FILE        True if file exists.
-e FILE        True if file exists.
-f FILE        True if file exists and is a regular file.
-r FILE        True if file is readable by you.
-s FILE        True if file exists and is not empty.
-w FILE        True if the file is writable by you.