On Thu, Jan 31, 2008 at 02:47:54PM +0100, Robert Krahn wrote:

Hello!

How can I delete a read-only file under windows.

FileDirectory>>deleteFileNamed: gives me a CannotDeleteFileException.

Can I force the deletion? Can I change the file properties?

Hi Robert,

Squeak tries to be very portable across operating systems, so in general it does not provide much in the way of operating system or file system functions. Changing file properties is not supported in Squeak, mainly because the concept of "file properties" means different things on different file systems and operating systems.

There are some add-on packages that can help with this sort of thing (such as FFI and OSProcess), but you can't count on these being available on all Squeak images or on all operating systems. It's probably a good idea for you to handle things like this with a Windows file browser unless there is a strong reason to do it from Squeak.

Dave

Hello,

thank you for the information.

The usage of OSProcess would be fine. E.g. if I could execute OSProcess command: 'del /a:R test' to delete the read-only file named test. But unfortunately I get an error when I try to do this.

OSProcess command: 'rm test' on the other hand does work. But I cannot delete read-only files with the rm command (at least I don't know how).

So if there would be a way to use the del command with OSProcess I would be happy...

Robert

Am Feb 1, 2008 um 9:28 PM schrieb nicolas cellier:

David T. Lewis a écrit :

...

On Thu, Jan 31, 2008 at 02:47:54PM +0100, Robert Krahn wrote:

...

Hello!

How can I delete a read-only file under windows.

FileDirectory>>deleteFileNamed: gives me a CannotDeleteFileException.

Can I force the deletion? Can I change the file properties?

Hi Robert, Squeak tries to be very portable across operating systems, so in general it does not provide much in the way of operating system or file system functions. Changing file properties is not supported in Squeak, mainly because the concept of "file properties" means different things on different file systems and operating systems. There are some add-on packages that can help with this sort of thing (such as FFI and OSProcess), but you can't count on these being available on all Squeak images or on all operating systems. It's probably a good idea for you to handle things like this with a Windows file browser unless there is a strong reason to do it from Squeak. Dave

Squeak file handling library is not that sexy. I feel like portability is not the only reason.

For example, VW found a common denominator (linux/windows/mac/...) :

'foo.bar' asFilename makeWritable. 'foo.bar' asFilename directory makeWritable.

Sure, not perfect, you don't really know to who exactly will this writable flag apply, nor if the request will ever succeed... But at least, it has a chance to solve some simple situations.

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