Beefy Boxes and Bandwidth Generously Provided by pair Networks
Think about Loose Coupling

Re: Writeability of a file for a different user

by strredwolf (Chaplain)
on Aug 03, 2011 at 03:15 UTC ( #918166=note: print w/replies, xml ) Need Help??

in reply to Writeability of a file for a different user

What I would do is stat() the file, which will get you the mask and I think the ID# of the user and group. From that, you can parse through /etc/group and /etc/passwd on any Unix.
Information doesn't want to be free. It wants to be feline.
  • Comment on Re: Writeability of a file for a different user

Replies are listed 'Best First'.
Re^2: Writeability of a file for a different user
by JavaFan (Canon) on Aug 03, 2011 at 06:50 UTC
    That works fine if access control is done solely by the standard permission bits. It fails is access control is done via ACLs, which allows making a file writeable for more than the owner of a file, without having to resort to groups. (One can only be a member of a limited number of groups, a number that quickly exceeds the number of permutations of a small group of people wanting to share files)

    AFAIK, there's no way to ACL querying with just standard Perl. But I'd be surprised if there aren't CPAN modules available that will do ACL management for the more common systems out there (but I haven't checked).

Log In?

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://918166]
[stevieb]: I'm learning that no matter how good a piece of software is at what it's supposed to do, it's a piece of shit without providing any API documentation. (Talking about C++ here currently). Seriously... write software for an embedded platform and make...
[stevieb]: guess based on the sparse examples, and the header files that are spread out illogically?
[stevieb]: document the public facing functions/methods people... ALL OF THEM.

How do I use this? | Other CB clients
Other Users?
Others romping around the Monastery: (10)
As of 2017-05-28 23:43 GMT
Find Nodes?
    Voting Booth?