Changes the permissions of a file or all files inside specified directories. Right now it has effect only under Unix. The permissions are also UNIX style, like the argument for the chmod command.
See the section on directory based tasks, on how the inclusion/exclusion of files works, and how to write patterns.
This task holds an implicit FileSet and supports all of FileSet's attributes and nested elements directly. More FileSets can be specified using nested <fileset> elements.