Question

I was trying to write a script which will be able to perform some build-in command ,such as : cp, rm, ls or whatever. The menu might be like this:

when you executed that some commands like "ls -la $currentdirectory" which will show almost all the information of the current directory.

缩略语:如果用户没有许可,(用户没有批准该名录的“最低生活标准”。

what command can check the permission? How to produce an error message if that user does not have the permission? Cheers hope to get that answer.

Answer 1

你不需要任何单独的指挥,才能在目录/档案上公布许可。 <代码>ls本身将产生错误的电文。

For example, I take away all permissions from everyone,

chmod 000 some_folder
ls some_folder/
ls: some_folder/: The file access permissions do not allow the specified action.

Most>Most 等系统中的指挥系统如果得不到足够的工作许可,就会自动用错误的电文 error误! 基本框架将注意不允许处境不利的用户/申请者经营。

Answer 2

grep -i umask ~/.profile /etc/profile