###@###.### (Ken Arnold - Sun Labs All platforms: File.getParent() does not return the parent directory, it should return ".." or the name of the parent directory in a file-system specific way. If you create the File object without specifying the directory, File.getParent() returns null. Steps to reproduce Compile and run the following code import java.io.*; class FileMethods { public static void main(String[] args) { File src = new File(".", "File.java"); System.out.println("getName() = " + src.getName() ); System.out.println("getPath() = " + src.getPath()); System.out.println("getAbsolutePath() = " + src.getAbsolutePath()); System.out.println("getParent() = " + src.getParent()); // without directory specified. src = new File("File.java"); System.out.println("getName() = " + src.getName() ); System.out.println("getPath() = " + src.getPath()); System.out.println("getAbsolutePath() = " + src.getAbsolutePath()); System.out.println("getParent() = " + src.getParent()); } } The description field as copied from bug report 1248081 follows: if /tmp is set to be the value for acl.read and acl.write, then one can use any relative path from /tmp to access any directory. for example, /tmp/../home/smani --> and perform read and write operations. Venkat.Rao@eng wrote a sample program to verify this: http://hubcap.eng/secure/Test.html
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