file.canWrite(); file.canRead(); file.canExceute(); always return true though my file/directory had no access rights

Question

need to check permission of file/directory i used

 //filePath = path of file/directory access denied by user ( in windows )
 File file = new File(filePath);
 file.canWrite(); 
 file.canRead();
 file.canExecute();

all of three returns true but m not able to delete any file/directory

The permissions you are checking are not for delete operation. — Sudhanshu Umalkar, Mar 21 '13 at 10:20
but if `file.canWrite();` returns true then it must me allow to delete too — Pravin, Mar 21 '13 at 10:52
No, not true. It is possible to have files that can be written, but not removed. In some OS, it is the permission on the containing diectory that counts. — Ingo, Mar 21 '13 at 12:17

score 2 · Accepted Answer · answered Mar 21 '13 at 10:22

2

You have to check:

SecurityManager.checkDelete(filepath);

As said in the JavaDoc

answered Mar 21 '13 at 10:22

Michaël

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`securityManager.checkDelete(fileLocaton);` gives me `java.lang.NullPointerException` Exception rather then SecurityException – Pravin Mar 21 '13 at 10:55
though `File file = new File(fileLoction)` and `file.exist();` returns true – Pravin Mar 21 '13 at 11:03

score 1 · Answer 2 · answered Jan 02 '14 at 03:21

1

Have you tried using the java.nio.file.Files#isWritable method?

answered Jan 02 '14 at 03:21

racc

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Why the downvote? Files.isWritable worked for me on Windows where the user is denied write access to the file, and File.canWrite returns true. System.getSecurityManager was returning null also. – racc Jan 03 '14 at 02:30

file.canWrite(); file.canRead(); file.canExceute(); always return true though my file/directory had no access rights

2 Answers2