Giving write permissions/revoking deleting ability

Harlin · 10-26-2006, 12:52 PM

I need to give users access to an ftp dir. All users will be able to write files/dirs to the ftp dir but only certain ones will be given delete abilities. Is there even a way to get this done? If so, how? "How" being the real question.

thanks,

Harlin

J_K9 · 10-26-2006, 01:34 PM

Yes, this is possible. For example, with Pure-FTPd (documentation):

Quote:

- '-K': Allow users to resume and upload files, but *NOT* to delete or rename
them. Directories can be removed, but only if they are empty. However,
overwriting existing files is still allowed (to support upload resume) . If
you want to disable this too, add -r (--autorename) .

I don't know if you can do this on a per-user basis, but that might get you started. I'll keep looking

timmeke · 10-30-2006, 07:20 AM

Using vsftpd, you should be able to use a conjunction of cmds_allowed and user_config_dir to make this happen.

If you only want the owner of the file to be able to delete/rename the file, you could check out the "sticky bit" on directories. See "man chmod" for details. Many FTP daemons, like vsftpd, have some options to play around with the file ownership of uploaded files. Using that in conjunction with the sticky bit may prevent certain users from deleting/renaming specific files.