java.lang.Object java.security.Permission java.io.FilePermission
Pathname is the pathname of the file or directory granted the specified
actions. A pathname that ends in "/*" (where "/" is
the file separator character,
all the files and directories contained in that directory. A pathname
that ends with "/-" indicates (recursively) all files
and subdirectories contained in that directory. A pathname consisting of
the special token "<<ALL FILES>>" matches any file.
Note: A pathname consisting of a single "*" indicates all the files in the current directory, while a pathname consisting of a single "-" indicates all the files in the current directory and (recursively) all files and subdirectories contained in the current directory.
The actions to be granted are passed to the constructor in a string containing a list of one or more comma-separated keywords. The possible keywords are "read", "write", "execute", "delete", and "readlink". Their meaning is defined as follows:
Runtime.execto be called. Corresponds to
File.deleteto be called. Corresponds to
The actions string is converted to lowercase before processing.
Be careful when granting FilePermissions. Think about the implications of granting read and especially write access to various files and directories. The "<<ALL FILES>>" permission with write action is especially dangerous. This grants permission to write to the entire file system. One thing this effectively allows is replacement of the system binary, including the JVM runtime environment.
Please note: Code can always read a file from the same directory it's in (or a subdirectory of that directory); it does not need explicit permission to do so.
public FilePermission(String path, String actions)
A pathname that ends in "/*" (where "/" is
the file separator character,
A pathname consisting of a single "*" indicates all the files in the current directory, while a pathname consisting of a single "-" indicates all the files in the current directory and (recursively) all files and subdirectories contained in the current directory.
A pathname containing an empty string represents an empty path.
FilePermission(String path, int mask)
|Method from java.io.FilePermission Summary:|
|equals, getActions, getMask, hashCode, implies, impliesIgnoreMask, newPermissionCollection|
|Methods from java.security.Permission:|
|checkGuard, equals, getActions, getName, hashCode, implies, newPermissionCollection, toString|
|Methods from java.lang.Object:|
|clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait|
|Method from java.io.FilePermission Detail:|
public String getActions()
public int hashCode()
public boolean implies(Permission p)
More specifically, this method returns true if:
boolean impliesIgnoreMask(FilePermission that)
FilePermission objects must be stored in a manner that allows them
to be inserted into the collection in any order, but that also enables the
For example, if you have two FilePermissions:
and you are calling the
"/tmp/scratch/foo", "read,write",then the