Module java.base

Package java.nio.file

Class LinkPermission

java.lang.Object

java.security.Permission

java.security.BasicPermission

java.nio.file.LinkPermission

All Implemented Interfaces:

Serializable, Guard

public final class LinkPermission
extends BasicPermission

The Permission class for link creation operations.

The following table provides a summary description of what the permission allows, and discusses the risks of granting code the permission.

Table shows permission target name, what the permission allows, and associated risks

Permission Target Name	What the Permission Allows	Risks of Allowing this Permission
hard	Ability to add an existing file to a directory. This is sometimes known as creating a link, or hard link.	Extreme care should be taken when granting this permission. It allows linking to any file or directory in the file system thus allowing the attacker access to all files.
symbolic	Ability to create symbolic links.	Extreme care should be taken when granting this permission. It allows linking to any file or directory in the file system thus allowing the attacker to access to all files.

Since:

1.7

See Also:

• Files.createLink(java.nio.file.Path, java.nio.file.Path)
• Files.createSymbolicLink(java.nio.file.Path, java.nio.file.Path, java.nio.file.attribute.FileAttribute<?>...)
• Serialized Form

Constructor Summary

Constructors

Constructor	Description
LinkPermission(String name)	Constructs a LinkPermission with the specified name.
LinkPermission(String name, String actions)	Constructs a LinkPermission with the specified name.

Method Summary

Methods declared in class java.security.BasicPermission

equals, getActions, hashCode, implies, newPermissionCollection

Methods declared in class java.security.Permission

checkGuard, getName, toString

Methods declared in class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Details

LinkPermission

public LinkPermission(String name)

Constructs a LinkPermission with the specified name.

Parameters:

name - the name of the permission. It must be "hard" or "symbolic".

Throws:

IllegalArgumentException - if name is empty or invalid

LinkPermission

public LinkPermission(String name,
 String actions)

Constructs a LinkPermission with the specified name.

Parameters:

name - the name of the permission; must be "hard" or "symbolic".

actions - the actions for the permission; must be the empty string or null

Throws:

IllegalArgumentException - if name is empty or invalid, or actions is a non-empty string