forked from Georg/pyacl
Georg Pfuetzenreuter
97299af765
Align with the other script which is already under scripts/. Signed-off-by: Georg Pfuetzenreuter <mail@georg-pfuetzenreuter.net>
78 lines
2.3 KiB
Markdown
78 lines
2.3 KiB
Markdown
# pyacl
|
|
|
|
## Overview
|
|
|
|
This is a high level abstraction over the great [pylibacl](https://pylibacl.k1024.org/) library.
|
|
It removes the need for low level understanding of POSIX.1e by providing an interface similar to what one is used to by common ACL handling tools such as `getfacl(1)` and `setfacl(1)`. Handling of ACLs in `pyacl` happens through a map resembling what one would find as a result of calling `getfacl(1)`.
|
|
|
|
## Example
|
|
|
|
### Reading the ACL of a path
|
|
|
|
The following shows a file at `/tmp/testacl1` on which an ACL granting the user `georg2` read permissions was applied.
|
|
|
|
#### Result from `getfacl(1)`:
|
|
|
|
```
|
|
$ getfacl -c /tmp/testacl1
|
|
getfacl: Removing leading '/' from absolute path names
|
|
user::---
|
|
user:georg2:r--
|
|
group::r--
|
|
mask::r--
|
|
other::---
|
|
```
|
|
|
|
#### Result from `pyacl`:
|
|
|
|
```
|
|
>>> from pyacl import acl
|
|
>>> acl.parse_acl_from_path('/tmp/testacl1')
|
|
{'user': {'georg2': {'read': True, 'write': False, 'execute': False}},
|
|
'group': {None: {'read': True, 'write': False, 'execute': False}},
|
|
'mask': {None: {'read': True, 'write': False, 'execute': False}},
|
|
'other': {None: {'read': False, 'write': False, 'execute': False}}}
|
|
```
|
|
|
|
### Writing an ACL to a path
|
|
|
|
The following will apply ACL granting the user `georg2` read permissions to a file at `/tmp/testacl2`.
|
|
|
|
```
|
|
echo hi > /tmp/testacl2
|
|
```
|
|
|
|
#### With `setfacl(1)`:
|
|
|
|
```
|
|
setfacl -m u:georg2:r /tmp/testacl2
|
|
```
|
|
|
|
#### With `pyacl`:
|
|
|
|
```
|
|
>>> from pyacl import acl
|
|
>>> myacl = acl.build_acl(target_name='georg2', target_type='user', read=True, write=False, execute=False)
|
|
>>> acl.apply_acl_to_path(myacl, '/tmp/testacl2')
|
|
```
|
|
|
|
Of course, the `build_acl()` call could be shortened by omitting default arguments.
|
|
|
|
## Documentation
|
|
|
|
The functions provided by `pyacl` are documented through docstrings. Find them in the source code, or by calling `help()` - example:
|
|
|
|
```
|
|
>>> from pyacl import acl
|
|
>>> help(acl.build_acl)
|
|
Help on function build_acl in module pyacl.acl:
|
|
|
|
build_acl(target_name, target_type, read=False, write=False, execute=False)
|
|
Example usage: build_acl(target_name='georg2', target_type='user', read=True, write=False, execute=True)
|
|
Return: posix1e.ACL
|
|
```
|
|
|
|
## Hacking/Tests
|
|
|
|
Functionality is tested through `pytest`. As it requires a certain test user to be present, easiest is to use the purpose-built container image. A wrapper is provided at `scripts/test.sh`.
|