Directory Permissions problem when using mkdir() of the File class

Posted on 2008-06-17
Last Modified: 2013-12-29

I hava a Java application that creates directories using the mkdir() method of the File class. This is in UNIX. when the directory is created by madir() it has drwxr-xr-x permissions string by default. As you can see the user has r/w/ex permissions, and the group has only r/ex permissions and does not have 'write' permissions. Our requirement is, when this directory is created, we must give permissions to the group also for writing.

Since mkdir() defaults to drwxr-xr-x, how can I set the peremissions to be drwxrwxr-x so that the group will also have write permissions when the directory is created.

Question by:prain
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LVL 86

Accepted Solution

CEHJ earned 250 total points
ID: 21802206
Two ways i can think of

1. set the umask of the shell in which the java app is running to 0002 (man umask)
2. Runtime.exec a chmod after the fact

Author Comment

ID: 21802333
is'nt there a direct Java way of doing that?
LVL 86

Expert Comment

ID: 21802378
No. Java is platform independent, so would have no platform-dependent way of altering file perms
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Author Comment

ID: 21802391
Ok. That' right. I will try this.

Author Closing Comment

ID: 31467929
OK. That works Great!.  Thanks.
LVL 86

Expert Comment

ID: 21803985

Which way did you go in the end?

Author Comment

ID: 21807006
I set the permissions using chmod 775  by Runtime.exe();

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