LinkPermission (Java SE 13 & JDK 13 )
Description: declaration: module: java.base, package: java.nio.file, class: LinkPermission
Keywords: java.nio.file.LinkPermission class

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