UNIX for Advanced & Expert Users

Hi,

we have an FTP Server running on Unix. Users' home directories are protected with 700 permissions and all working fine. Recently we got a requirement to allow everyone to upload new files (not to overwrite existing files, of course) into others' home directories but without having provided them READ (without delete and execute) permissions. In other words, e.g., if we have 3 users A B and C then
1. A must be allowed to upload new files into B and C home directories.
2. A must NOT have any permissions on B and C homedirectores including read, delete and execute etc.

Is it possible to implement? if yes, any help would highly be appreciated

TIA

Prvn

1. Is this wise?

2. Who owns the file uploaded into somebody elses home directory?

3. Is a person no longer responsible for what goes on in their own home directory?

4. Why not have a well-known subdirectory within each person's home directory for receiving foreign uploads?

Thanks Porter for your reply...

Having a sub-directory in each user's home directory for foreign uploads is good idea BUT i have to compromise to 755 permissions on home_dir to allow access to the sub-folder (r-x on home_dir) whereas it is supposed to be 700.

How can we achieve my requirement without having permissions compromised?


Prvn

When you say that the directory permission should be 700,
effectively this ceases the possibility of any foreign uploads

Here is a suggestion.

Create a new user and home directory called "upload".

This has a directory, one per normal user with the users names as the directory names.

/home/upload/tom
/home/upload/dick
/home/upload/harry

These can have rights to allow others to put files in, do this with the group access. These directories are still owned by each individual user. Then each user has a symbolic link called "upload" in their home directory that points to their upload/user directory.

eg:

/home/tom/upload -> /home/upload/tom

Thanks Porter for your solution.

This works good for me.


Prvn