Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > comp.lang.python > #197742

Re: Python linuxfs Modules

Show all headers | View raw

On Tue, 17 Mar 2026 23:28:26 -0700, Paul Rubin wrote:

> There were a few things like this that were missing for years. I was
> going to suggest adding them to your modules, but it looks like
> they've finally made it to the Python world elsewhere.

Someone else had already done a wrapper for the ACL functions
<https://github.com/iustin/pylibacl>. However, I feel they expose too
much of the underlying libacl details -- for example, I don’t see the
point in separating a “permset” object from its associated ACL entry,
since the two are always tied together anyway. Also they have written
an extension module in C, whereas mine is a pure-Python implementation
using ctypes. As for what difference it makes, consider that they need
about 1800 lines of code, whereas I can provide equivalent
functionality in about half that.

Actually, I have a plan to go further. I have figured out that the
contents of an ACL can be expressed most naturally as a Python object
with the following components:

  * a user_access array, indexed by the USERCLASS enum (with values
    USER, GROUP and OTHER), with each value being a set of the PERM
    enum (with the expected values READ, WRITE and EXECUTE); put these
    together, and you get the usual *nix mode value.
  * two dictionaries, “users” and “groups”, keyed by user and group
    IDs respectively, with the values being sets of PERM as before.
    You have the usual Python dictionary operations to
    access/iterate/add/modify/remove entries in these -- no need
    to invent new API-specific ones.
  * a mask value, being yet another set of PERM.

Working at that level, it seems to me, would be easier than any simple
wrapper around libacl.

Back to comp.lang.python | Previous | Next — Previous in thread | Next in thread | Find similar

Thread

Python linuxfs Modules Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-03-17 06:33 +0000
  Re: Python linuxfs Modules Oguz Kaan Ocal <oguzkaanocal3169@hotmail.com> - 2026-03-17 14:30 +0300
    Re: Python linuxfs Modules Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-03-17 21:26 +0000
      Re: Python linuxfs Modules Oguz Kaan Ocal <oguzkaanocal3169@hotmail.com> - 2026-03-22 14:14 +0300
  Re: Python linuxfs Modules Paul Rubin <no.email@nospam.invalid> - 2026-03-17 23:28 -0700
    Re: Python linuxfs Modules Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-03-18 08:04 +0000
      Re: Python linuxfs Modules Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-03-21 23:10 +0000
  Re: Python linuxfs Modules DFS <nospam@dfs.com> - 2026-04-08 12:26 -0400

csiph-web